Bar to help with sitting Abdominal Muscle Trainer Abdominal Exercise Device Black White Description: Improved Sit Up Assistant Bars, self-priming, made of metal base, pp material and sponge - very convenient to use Easy installation: just pull the long handle and large suction cup, larger bearing surface, more suction force, more stable Designed to help with belly rolling, push-ups, side kicks, squats, back stretching, elbow, push-ups and other sports Sponge-wrapped straps provide a more comfortable angle depending on posture It can be used on flat and smooth floors such as marble floors, tile floors, wood floors, composite floors. Specification: Material: metal, PP, sponge Suction cup size: 120x148mm/4,7x5,8 inch Sponge length: 112 mm/4,4 inch The package includes: 1-Piece Seat Assistant Bar