Durable Material Fitness Bearing Pulley is made of high-quality nylon with a steel bearing, offering durability and wear resistance. Fitness Wheel Replacement Nylon pulley wheels serve as excellent replacements for gym equipment and garage door pulley systems, easy to replace. Universal Bearing Pulley Wheel The pulley wheel has an inner hole diameter of 10mm, suitable for most gym equipment, home gyms, and commercial or personal use. Features Nylon bearing pulley wheel provides low noise, stable performance, and high load capacity. Minimal friction ensures smooth movement. Easy to Install Gym bearing pulley wheel is lightweight and simple to install. Specification Material: Nylon, Metal Size: Inner Hole Diameter: 1cm Package Includes 1 Piece Fitness Bearing Pulley Note: Please allow slight variations due to manual measurement and differences in display monitors.