Adjustable Length: The pulley cable is easy to install.We use 3pcs steel safety buckles to ensure 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.,Silence, Strong and Sturdy: The PU cable is silence when doing workout, high wear resistance, softness and high fitigue resistance.,Widely Use:Suitable for all fitness pulley systems, it can be used at home or fitness room.