... pcs 3.with manual 4.pass CE,RoHs sit up,abdominal,abItem No.:MX-TV007material: ABS+sponge+stainless steelPacking:color box1pcs ... ,RoHs certificate The purpose of it is to include more muscles allowing you to be able to do more crunches and ... with the lower body resistance, working all four sets of abdominal muscles. With The Perfect Situp, it is designed to be more ...