Features: The pulley has a lower coefficient of friction, reduced vibrations, and lower noise. Our waterproof bearing pulley is suitable for fitness equipment and garage door roller disc systems. The pulley is made of high-quality, wear-resistant PA material and can be used for many years. It is a universal pulley for most fitness equipment and ideal as a replacement roller for fitness machines. Service: If you are not satisfied with our product or have any questions, please . Specifications: Material: PA Color: As shown in the picture Size Options: 50/60/70/90/100/110/120/160 (More size details available in the photo.) Package Includes: 1 x Bearing Pulley Note: Please allow 1-2 cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the picture may not reflect the actual color of the item. Thank you!