Author Archives: ep

China Professional Custom Single Fixed Mountaineering Pulley air compressor portable

China Professional Custom Single Fixed Mountaineering Pulley: Your Ultimate Solution for Safe and Smooth Climbing

Are you a climbing enthusiast looking for a reliable and safe mountaineering pulley? Look no further than the China Professional Custom Single Fixed Mountaineering Pulley! Made of high-quality aluminum, this pulley is designed to withstand tough climbing conditions while ensuring your safety and comfort. With a breaking strength of 30kN and rope compatibility of ≤13mm, this pulley can handle heavy loads and thick ropes with ease.

Technical Specifications

Material Aluminium
Weight 120g
Breaking strength 30kN
Rope compatibility ≤13mm
Length 79mm
Width 58mm

This mountaineering pulley is compact and lightweight, making it easy to carry on your climbing adventures. Its smooth and durable design ensures a safe and smooth climb, giving you peace of mind while you enjoy the thrill of climbing.

FAQs

1. What is the breaking strength of the China Professional Custom Single Fixed Mountaineering Pulley?

The breaking strength of this pulley is 30kN, making it a reliable and safe option for climbers.

2. Can this pulley handle thick ropes?

Yes, the China Professional Custom Single Fixed Mountaineering Pulley can handle ropes with a diameter of up to 13mm.

3. Is this pulley easy to carry while climbing?

Yes, this pulley is lightweight and compact, making it easy to carry on your climbing adventures.

4. Is this pulley durable?

Yes, this pulley is made of high-quality aluminum and designed to withstand tough climbing conditions, ensuring its durability and longevity.

5. Can I customize this pulley?

Yes, our company welcomes custom orders for this pulley and other products. Please contact our customer service center for more information on customized orders.

Our company provides a wide range of industrial products, including agricultural gearboxes, power output shafts, sprockets, fluid couplings, worm gear reducers, gears and racks, roller chains, pulleys, planetary gearboxes, timing pulleys, bushings, and more. We are committed to providing high-quality products, preferential prices, and considerate services to our valued customers. Contact us today to see how we can meet your industrial product needs!

All the content of this page is from the Internet, the content is only as a reference for product selection, our products are replacement parts and not original spare parts; we are not the holder of the original trademarks of the content, our products are only suitable for after-sales replacement parts and not original spare parts, our replacement parts can be perfectly adapted to the original spare parts; if you need to buy original spare parts, please contact the original factory to buy. If you want to buy original spare parts, please contact the original supplier for purchase.

Performance Characteristics of Fixed Pulley

The fixed pulley is a simple machine that is commonly used to transfer force and move objects. It has several performance characteristics that make it a valuable component in many fields.

  • Efficiency: Fixed pulleys have a high level of efficiency, meaning that the input force is almost equal to the output force.
  • Strength: Fixed pulleys are typically made of durable materials, such as steel or aluminum, and can withstand heavy loads.
  • Flexibility: Fixed pulleys can be used in various applications and can be incorporated into different systems.
  • Cost-Effective: Fixed pulleys are generally less expensive than other types of pulleys, making them a cost-effective solution for many applications.

Types and Characteristics of Fixed Pulley

Fixed pulleys can come in different types based on their design and construction. Single fixed pulleys have only one wheel and are often used to change the direction of a force. Double fixed pulleys have two wheels and can increase the mechanical advantage of a system. Triple fixed pulleys have three wheels and can further increase mechanical advantage.

The materials used to make fixed pulleys can also affect their characteristics. Steel pulleys are strong and durable, making them ideal for heavy-duty applications. Aluminum pulleys are lightweight and corrosion-resistant, making them suitable for outdoor use.

Advantages of Fixed Pulleys Made of Different Materials

Fixed pulleys can be made of various materials, each with its own advantages. Steel pulleys are strong and durable, making them ideal for heavy-duty applications. They can withstand high loads and are less prone to wear and tear.

Aluminum pulleys are lightweight and corrosion-resistant, making them suitable for outdoor use. They are also easy to install and require less maintenance.

Plastic pulleys are lightweight and affordable, making them ideal for smaller applications. They can also be used in wet environments, as they are resistant to corrosion.

Application of Fixed Pulley

Fixed pulleys can be found in various fields, including Mechanical Advantage Systems, Exercise Equipment, Home Improvement, Agriculture, Household Applications, and more. In Mechanical Advantage Systems, fixed pulleys can be used to lift heavy loads with less effort. In Exercise Equipment, fixed pulleys can be used to train the muscles and improve strength. In Home Improvement, fixed pulleys can be used to move heavy objects or lift materials to higher floors. In Agriculture, fixed pulleys can be used to raise and lower farm equipment. In Household Applications, fixed pulleys can be used for DIY projects and repairs.

Future Development Trends and Opportunities

The fixed pulley market is expected to grow in the coming years, driven by the increasing demand for affordable and efficient mechanical solutions. There is also a growing trend towards sustainability and eco-friendliness, which could create opportunities for manufacturers to produce pulleys made from renewable or recycled materials. Additionally, the rise of e-commerce and online marketplaces could make it easier for consumers to find and purchase fixed pulleys.

How to Choose a Suitable Fixed Pulley

When choosing a fixed pulley, several factors should be considered, including load capacity, material, diameter and size, type of pulley, and bore size.

Load capacity refers to the maximum weight that the pulley can support. It is important to choose a pulley with a load capacity that is greater than the weight of the object being lifted.

The material of the pulley can affect its strength, durability, and corrosion resistance. Steel is a strong and durable material, while aluminum is lightweight and corrosion-resistant.

The diameter and size of the pulley can affect its efficiency and the amount of force required to move an object. Smaller pulleys require less force but have a lower mechanical advantage. Larger pulleys require more force but have a higher mechanical advantage.

The type of pulley can also affect its application. Single pulleys are ideal for changing the direction of a force, while double and triple pulleys are better suited for increasing mechanical advantage.

The bore size of the pulley refers to the diameter of the hole in the center of the wheel. It is important to choose a pulley with a bore size that matches the diameter of the shaft it will be mounted on.

Summary

Fixed pulleys are an essential component in various fields, including Mechanical Advantage Systems, Exercise Equipment, Home Improvement, Agriculture, and Household Applications. They have several performance characteristics, including high efficiency, strength, flexibility, and cost-effectiveness. Fixed pulleys can be made of different materials, each with its own advantages. When choosing a fixed pulley, several factors should be considered, such as load capacity, material, diameter and size, type of pulley, and bore size. The future development of fixed pulleys is expected to be driven by the increasing demand for affordable and eco-friendly mechanical solutions.

Author: Dream

China Best Sales Wholesale of Color Steel Track Pulley V-Shaped Fixed Pulley air compressor repair near me

Color Steel Track Pulley V-Shaped Fixed Pulley for Wholesale in China

Our Color Steel Track Pulley V-Shaped Fixed Pulley is a high-quality product that is perfect for industrial use. Made with precision and expertise, this pulley is designed to provide optimal performance and durability. The product has been extensively tested to ensure that it meets the highest standards of quality and reliability.

The pulley is available in a range of models, each with different specifications to suit different requirements. The Single Bearing Trapezoid Gate Wheel is perfect for light-duty applications, while the Double Bearing Gate Wheel is designed for heavy-duty applications. The Laminated Gate Wheel is ideal for medium-duty applications, while the Hang Gate Wheel is perfect for use in hanging gates.

Product Specifications

Here are the specifications of each model:

Single Bearing Trapezoid Gate Wheel

Model A B C D E Weight (Y) Units:g Weight (U) Units:g Weight (V) Units:g
30×11 35 11 30 45 17 * * 63
40×14 45 14 38 75 25 192 185 194
50×15 55 15 48 75 25 253 244 263
50×15 60 15 48 85 30 303 292 302
60×17 65 20 58 85 30 400 395 410
70×20 80 20 68 100 35 640 640 665
80×20 85 20 48 100 35 805 785 825
90×20 100 20 88 133 35 1130 1121 1145
100×20 105 20 98 133 35 1350 1338 1363
The data is measured by hand, maybe there are some errors, just for reference.

Double Bearing Gate Wheel

Model A B C D E Weight(Y) Weight(U)
50MM 55 26 48 85 30 324 320
60MM 65 30 58 85 30 617 580
70MM 80 32 68 100 35 977 954
80MM 85 32 48 100 35 1260 1223
90MM 100 32 88 133 35 1788 1760
100MM 105 32 98 133 35 2100 2078
The data is measured by hand, maybe there are some errors, just for reference.

Laminated Gate Wheel

Model A B C D Weight(Y/V) Weight(U)
50mm 48 15 100 26 260 250
60mm 58 17 100 26 390 360
70mm 68 20 136 33 590 570
80mm 78 20 136 33 750 725
90mm 88 20 152 33 1060 1030
100mm 98 20 152 33 1265 1225
The data is measured by hand, maybe there are some errors, just for reference.

Hang Gate Wheel

Model A B C D E F G H I
H25 51 25 M9*50 9 95 79 25 6 27
H38 86 38 M12*70 11 120 118 38 10 32
H55 115 55 M20*85 14 140 159 44 10 15
The data is measured by hand, maybe there are some errors, just for reference.

Our company mainly supplies various products for industrial use, such as agricultural gearboxes, power output shafts, sprockets, fluid couplings, worm gear reducers, gears and racks, Roller chains, pulleys, planetary gearboxes, timing pulleys, bushings, etc. We are committed to providing high-quality products, preferential prices, and considerate services. Customers are welcome to customize drawings and samples.

Frequently Asked Questions (FAQs)

Q1: What is the load capacity of the Color Steel Track Pulley V-Shaped Fixed Pulley?

A1: The load capacity varies depending on the model. Please refer to the product specifications for more information.

Q2: Can the Color Steel Track Pulley V-Shaped Fixed Pulley be used for heavy-duty applications?

A2: Yes, the Double Bearing Gate Wheel is specifically designed for heavy-duty applications.

Q3: How can I guarantee the quality of the Color Steel Track Pulley V-Shaped Fixed Pulley?

A3: The product has been extensively tested to ensure that it meets the highest standards of quality and reliability. We also offer extra goods for insurance and have satisfied after-service.

Q4: What is the minimum order quantity (MOQ) for the Color Steel Track Pulley V-Shaped Fixed Pulley?

A4: The MOQ is 500 PCS.

Q5: How long will it take to receive my order of the Color Steel Track Pulley V-Shaped Fixed Pulley?

A5: It will take approximately 30 days to complete and receive your order. However, the specific timeline may vary depending on the production schedule of the production department.

All the content of this page is from the Internet, the content is only as a reference for product selection, our products are replacement parts and not original spare parts; we are not the holder of the original trademarks of the content, our products are only suitable for after-sales replacement parts and not original spare parts, our replacement parts can be perfectly adapted to the original spare parts; if you need to buy original spare parts, please contact the original factory to buy. If you want to buy original spare parts, please contact the original supplier for purchase.

Performance Characteristics of Fixed Pulley

The fixed pulley is a simple machine that is commonly used to transfer force and move objects. It has several performance characteristics that make it a valuable component in many fields.

  • Efficiency: Fixed pulleys have a high level of efficiency, meaning that the input force is almost equal to the output force.
  • Strength: Fixed pulleys are typically made of durable materials, such as steel or aluminum, and can withstand heavy loads.
  • Flexibility: Fixed pulleys can be used in various applications and can be incorporated into different systems.
  • Cost-Effective: Fixed pulleys are generally less expensive than other types of pulleys, making them a cost-effective solution for many applications.

Types and Characteristics of Fixed Pulley

Fixed pulleys can come in different types based on their design and construction. Single fixed pulleys have only one wheel and are often used to change the direction of a force. Double fixed pulleys have two wheels and can increase the mechanical advantage of a system. Triple fixed pulleys have three wheels and can further increase mechanical advantage.

The materials used to make fixed pulleys can also affect their characteristics. Steel pulleys are strong and durable, making them ideal for heavy-duty applications. Aluminum pulleys are lightweight and corrosion-resistant, making them suitable for outdoor use.

Advantages of Fixed Pulleys Made of Different Materials

Fixed pulleys can be made of various materials, each with its own advantages. Steel pulleys are strong and durable, making them ideal for heavy-duty applications. They can withstand high loads and are less prone to wear and tear.

Aluminum pulleys are lightweight and corrosion-resistant, making them suitable for outdoor use. They are also easy to install and require less maintenance.

Plastic pulleys are lightweight and affordable, making them ideal for smaller applications. They can also be used in wet environments, as they are resistant to corrosion.

Application of Fixed Pulley

Fixed pulleys can be found in various fields, including Mechanical Advantage Systems, Exercise Equipment, Home Improvement, Agriculture, Household Applications, and more. In Mechanical Advantage Systems, fixed pulleys can be used to lift heavy loads with less effort. In Exercise Equipment, fixed pulleys can be used to train the muscles and improve strength. In Home Improvement, fixed pulleys can be used to move heavy objects or lift materials to higher floors. In Agriculture, fixed pulleys can be used to raise and lower farm equipment. In Household Applications, fixed pulleys can be used for DIY projects and repairs.

Future Development Trends and Opportunities

The fixed pulley market is expected to grow in the coming years, driven by the increasing demand for affordable and efficient mechanical solutions. There is also a growing trend towards sustainability and eco-friendliness, which could create opportunities for manufacturers to produce pulleys made from renewable or recycled materials. Additionally, the rise of e-commerce and online marketplaces could make it easier for consumers to find and purchase fixed pulleys.

How to Choose a Suitable Fixed Pulley

When choosing a fixed pulley, several factors should be considered, including load capacity, material, diameter and size, type of pulley, and bore size.

Load capacity refers to the maximum weight that the pulley can support. It is important to choose a pulley with a load capacity that is greater than the weight of the object being lifted.

The material of the pulley can affect its strength, durability, and corrosion resistance. Steel is a strong and durable material, while aluminum is lightweight and corrosion-resistant.

The diameter and size of the pulley can affect its efficiency and the amount of force required to move an object. Smaller pulleys require less force but have a lower mechanical advantage. Larger pulleys require more force but have a higher mechanical advantage.

The type of pulley can also affect its application. Single pulleys are ideal for changing the direction of a force, while double and triple pulleys are better suited for increasing mechanical advantage.

The bore size of the pulley refers to the diameter of the hole in the center of the wheel. It is important to choose a pulley with a bore size that matches the diameter of the shaft it will be mounted on.

Summary

Fixed pulleys are an essential component in various fields, including Mechanical Advantage Systems, Exercise Equipment, Home Improvement, Agriculture, and Household Applications. They have several performance characteristics, including high efficiency, strength, flexibility, and cost-effectiveness. Fixed pulleys can be made of different materials, each with its own advantages. When choosing a fixed pulley, several factors should be considered, such as load capacity, material, diameter and size, type of pulley, and bore size. The future development of fixed pulleys is expected to be driven by the increasing demand for affordable and eco-friendly mechanical solutions.

Author: Dream

China Hot selling High Quality Mountaineering Fixed Pulley Hoisting Single Pulley Zip Line pulley assembly

Product Description

 

 

Product Description

Hot sale 20KN Rock Climbing Pulley Rope Belt Lifting Sling Accessories Pulley

Equipment Outdoor Pulley

 

Product Name: Small Single Pulley
Product material: 7075 aluminum magnesium alloy
Product color: Customizable
Product origin: ZheJiang
Net weight of product:  90g
Breaking force: 20KN
Scope of application: Short distance crossing, indoor training, freight transportation, etc.

 

Certifications

 

 

 

Packaging & Shipping

Packing: 1 pc per opp bag, 10pcs per master carton, Carton size: 75x40x35cm, G.W: 28.00kg
Payment:T/T 30% in advance, 70% before shipment,L/C , Western Union

Company Profile

ZheJiang CHINAMFG Import and Export Co., Ltd. was established in 2014. It is a company specializing in the production of safety belts and safety ropes. It is located in the hometown of rope nets – Lizhuang, ZheJiang . In order to ensure complete customer satisfaction, the professional customer service team provides 24/7 service all year round and has won numerous praises from customers. The products sell well in all provinces and cities across the country, and are exported to customers in the United States, Britain, France, Malaysia and other countries and regions. We also welcome OEM and ODM. We will provide you with the most professional service.

 

FAQ

1 . Q : Are you a factory or trading company ?
A : We are a genuine manufacturer .
2 . Q : Where is your factory located ? How can I visit there ?
A : Our factory is located in HangZhou City , ZheJiang Province , China , You can travel to the HangZhou Airport by airplane. We  will pick you up from there . All our clients , from domestic or abroad , are warmly welcome to visit us !
3 . Q : What makes you different fromothers ?
A : Our excellent quality Products and Service .
B : Our fast lead time . For Normal orders , we will promise to produce within 7 – 2 0 days . As a factory , we can ensure the  delivery time according to the formal contract .
4 . Q : What is the term of payment ?
A : T / T,  LC 

/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Type: Pulley
Season: Winter, Autumn, Summer, Spring
Application: Outdoor, Indoor
Samples:
US$ 10/Piece
1 Piece(Min.Order)

|

Order Sample
Customization:
Available

|

Customized Request

.shipping-cost-tm .tm-status-off{background: none;padding:0;color: #1470cc}

Shipping Cost:

Estimated freight per unit.





about shipping cost and estimated delivery time.
Payment Method:







 

Initial Payment



Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

fixed pulley

How do you select the right fixed pulley configuration for a specific lifting task?

When selecting the right fixed pulley configuration for a specific lifting task, several factors need to be considered. Here’s a detailed explanation of the key considerations:

  1. Load Requirements: Determine the weight and dimensions of the load that needs to be lifted. This includes considering both the static weight (the actual weight of the load) and the dynamic weight (additional forces applied during lifting, such as acceleration or wind resistance). Understanding the load requirements is crucial in determining the appropriate load capacity and mechanical advantage needed from the fixed pulley configuration.
  2. Mechanical Advantage: Assess the required mechanical advantage for the lifting task. Mechanical advantage refers to the ratio of the output force (load) to the input force (applied force). Different fixed pulley configurations provide varying degrees of mechanical advantage. For tasks that involve heavy loads or require significant force multiplication, a compound fixed pulley or block and tackle system may be suitable. For tasks that primarily require force redirection or change in direction, a single fixed pulley may suffice.
  3. Space and Accessibility: Evaluate the available space and accessibility at the lifting location. Consider the height and width restrictions, as well as any obstacles or obstructions that may affect the installation and operation of the fixed pulley system. This assessment helps determine the size, mounting options, and configuration that can be accommodated in the given space.
  4. Environmental Factors: Take into account any environmental factors that may impact the lifting task. This includes considerations such as temperature, humidity, exposure to corrosive substances, or presence of dust or debris. Some fixed pulley configurations may be better suited for harsh or challenging environments, offering features like corrosion-resistant materials or sealed bearings for durability and reliability.
  5. Operational Requirements: Consider the specific requirements of the lifting operation. Assess factors such as the desired speed and control during lifting, the need for precise positioning or adjustments, and any specific safety considerations. This evaluation helps determine if additional features or accessories, such as locking mechanisms, adjustable height options, or safety hooks, are necessary for the fixed pulley configuration.
  6. Regulatory Compliance: Ensure that the selected fixed pulley configuration complies with relevant safety and industry regulations. Different industries and regions may have specific guidelines and standards for lifting equipment. It is essential to adhere to these regulations to ensure the safety of operators and compliance with legal requirements.

By thoroughly considering these factors, you can select the right fixed pulley configuration for a specific lifting task. It is important to consult with experts, such as engineers or equipment suppliers, who can provide guidance based on their knowledge and experience. Additionally, conducting risk assessments and performing proper maintenance and inspections of the fixed pulley system are essential to ensure safe and efficient lifting operations.

fixed pulley

How does the configuration of sheaves on a fixed pulley affect its performance?

The configuration of sheaves on a fixed pulley plays a crucial role in determining its performance and functionality. Here’s a detailed explanation of how the configuration of sheaves affects the performance of a fixed pulley:

The term “sheave” refers to the grooved wheel or pulley that is a key component of a fixed pulley. The configuration of sheaves refers to the arrangement and number of sheaves used in a fixed pulley system. The following factors are influenced by the configuration of sheaves:

  • Mechanical Advantage: The configuration of sheaves directly affects the mechanical advantage provided by the fixed pulley system. Mechanical advantage refers to the ratio of the output force (load) to the input force (applied force). By increasing the number of sheaves in the system, the mechanical advantage can be enhanced. For example, a compound pulley system with multiple sheaves can significantly reduce the amount of force required to lift a heavy load.
  • Efficiency: The configuration of sheaves can impact the efficiency of a fixed pulley system. Efficiency refers to the ratio of output work to input work. In general, the more sheaves in the system, the greater the frictional losses and the lower the overall efficiency of the system. However, using high-quality bearings and proper lubrication can help minimize friction and improve efficiency.
  • Load Capacity: The configuration of sheaves also affects the load capacity of a fixed pulley system. By distributing the load across multiple sheaves, the system can handle heavier loads without compromising safety or performance. The load capacity is influenced by factors such as the strength of the sheaves, the material of the sheaves, and the construction of the pulley system.
  • Flexibility and Directional Control: The configuration of sheaves can impact the flexibility and directional control of a fixed pulley system. By arranging the sheaves in different configurations, it is possible to achieve specific movement patterns or change the direction of the applied force. This flexibility and directional control are particularly useful in tasks that require precise positioning or movement of objects.
  • Space and Weight: The configuration of sheaves can also affect the space and weight requirements of a fixed pulley system. Adding more sheaves to the system may increase its size and weight. This factor needs to be considered, especially in applications where space is limited or where portability is important.

It’s important to note that the configuration of sheaves is not limited to a single type or arrangement. Different pulley systems can have varying numbers and arrangements of sheaves, depending on the specific task requirements and desired outcomes. Manufacturers often provide guidelines and recommendations for the optimal configuration of sheaves based on the intended use of the fixed pulley system.

In summary, the configuration of sheaves on a fixed pulley significantly affects its performance. It determines the mechanical advantage, efficiency, load capacity, flexibility, directional control, space requirements, and weight of the pulley system. By carefully considering the configuration of sheaves, users can tailor the system to meet their specific needs and achieve optimal performance in various applications.

fixed pulley

Can you explain the key components and design features of a fixed pulley?

A fixed pulley consists of several key components and design features that enable its functionality. Here’s a detailed explanation of the key components and design features of a fixed pulley:

A fixed pulley is a simple machine that changes the direction of a force without providing any mechanical advantage. Its design features and components include:

  • Wheel: The wheel is a circular component of the fixed pulley that has a grooved rim. It is typically made of durable materials such as metal or hard plastic. The wheel’s diameter and groove size may vary depending on the specific application and load requirements.
  • Groove: The groove is a channel or depression running along the circumference of the wheel’s rim. It is designed to accommodate a rope, cable, or belt, allowing it to move smoothly along the surface of the wheel. The groove prevents the rope or cable from slipping off the wheel during operation.
  • Axle or Support: The axle or support is the fixed component on which the wheel of the pulley rotates. It provides stability and allows the wheel to spin freely. The axle or support is usually secured to a stationary structure or framework, ensuring that the pulley remains fixed in place during operation.
  • Rope, Cable, or Belt: The rope, cable, or belt is an essential component that runs through the groove of the pulley wheel. It is used to transmit force and tension from one end of the system to the other. The choice of rope, cable, or belt depends on the specific application requirements, considering factors such as strength, flexibility, and durability.
  • Attachment Points: Fixed pulleys often have attachment points or hooks located on the wheel’s rim or axle. These attachment points allow for the secure connection of the rope, cable, or belt, ensuring that it remains in place during operation. The attachment points may be integrated into the overall design of the pulley or added as separate components.
  • Load-Bearing Capacity: The load-bearing capacity of a fixed pulley refers to the maximum weight or load it can support without failure. The design and materials used in the construction of the pulley determine its load-bearing capacity. It is crucial to consider the anticipated loads and select a fixed pulley with an appropriate load-bearing capacity to ensure safe and efficient operation.
  • Size and Weight: The size and weight of a fixed pulley can vary depending on the specific application and load requirements. Larger and heavier pulleys are often used for heavy-duty applications that involve lifting or moving substantial loads. Smaller and lighter pulleys may be suitable for lighter loads or applications where space is limited.

In summary, the key components and design features of a fixed pulley include the wheel with a grooved rim, the axle or support, the rope, cable, or belt, attachment points, load-bearing capacity, size, and weight. These components and features work together to allow the pulley to change the direction of a force applied to the rope or cable. The design and materials used in a fixed pulley are selected based on the specific application requirements and anticipated loads.

China Hot selling High Quality Mountaineering Fixed Pulley Hoisting Single Pulley Zip Line pulley assembly China Hot selling High Quality Mountaineering Fixed Pulley Hoisting Single Pulley Zip Line pulley assembly
editor by CX