The ideal way to add increased speed and amazing recoil to the double end bag training. Heavy-duty resistance band cables ? available in three different lengths and tensions ? are crafted to provide round after round of intense training in the gym or at home. Simply attach to the top or bottom side of the double end bag, and onto the floor or ceiling attachment, for sonic speed and movement that elite athletes demand in their workouts. The greater the tension the faster the rebound and recoil. Comes complete with two attached covered end S-hooks to easily secure to bag and floor or ceiling mount. Sizes: 16” Unstretched Length ? Stretches to approx. 26” length 28” Unstretched Length ? Stretches to approx. 46” length 32” Unstretched Length ? Stretches to approx. 52” length 36”Unstretched Length ? Stretches to approx. 60” length