Adjustable Length: The pulley cable is easy to install.We use 2pcs steel safety buckles to the safety.And can support up to 660 LB. Specification: This wire rope diameter 0.24inch/6mm including the black PU coating. It is more strong than 5mm. Made of high-strength PU materal + steel wire.The steel wire is consists of 7 shares,19 peices per share, Anti-dropping and Anti-Collision Design: The ball prevent the cable shakes.The metal sheets prevent the rubber stopper ball to hit the pulley during use it. This exercise will help you achieve incredible results: muscle, fat, strengthen core capabilities and flexibility to achieve the state. he gym pulley is perfect for all kinds of strength training. Pay attention to the growth of the back, shoulders and torso in all strength enhancements. Material: Stainless steel+PU+rubber colour: black Package Contents: 1 x tension rope 1 set x installation tools Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.