Whether you are looking to add resistance or assistance to Pull Up Revolution and Chest Expander exercises, these cables create the constant tension needed to increase muscle activation to build strength, endurance and flexibility. Available in eight resistance levels (purple 20lbs; pink 30lbs; maroon 40lbs; orange 50lbs; red 60lbs; yellow 70lbs; green 80lbs; blue 90lbs). Each of the three cables comes with a plugged end to ensure quick and secure interchange with Lifeline cable pockets and are built to withstand the dynamic bodyweight exercises that are the hallmarks of these muscle sculpting tools.