Century ActionFlex Swords The patented piston assembly is constructed of high tensile nylon bushings that allow the weapon to flex and return while maintaining its original structure When the multi-part system flexes, it transfers the force of the user's hit through the weapon to the target, replicating the flex of a multi-layered steel blade. The piston is able to move freely inside a foam-layered outer-shell, which reduces fatigue on the weapon. This flex-action gives all ActionFlex weapons the performance, durability and longevity expected of Century products. Colors= red or black, sizes = 24 inch, 34 inch or 40 inch