This item is a pulley wheel. Made of premium material, the pulley is durable and sturdy for long lasting time use. It is a universal pulley wheel for most gym equipment. Anti-impact and flexible for easy and convenient use. Perfect accessory as your gym equipment.-Aluminum Lift Wheel | Mikolo | | Pulley system for home gym, Aluminum Pulley Wheel Universal Alloy Bearing for Cable Machine Gym Equipment Part 21PCS | Silver | Best Buy