Adopts 50*80mm rectangular pipe and Q195 steel pipe with a wall thickness of 2.5mm as the main frame;  Rotation fulcrum: It is pressed by bearing steel with wear-resistant and uniform hardness, which makes the product run lightly; Cushion: The cushion and backrest foam are made of high-density recycled foam, with a thickness of 30MM and a density of 170KG/m; the board is made of high-density board, with a thickness of 18MM and a density of 650KG/m3; plus high-quality pvc material leather processing, cushion adjustment Convenient and fast, high safety; Counterweight: use flat steel counterweight pieces, each weighing 5kg;  Spraying: Special powder electrostatic spraying treatment for fitness equipment, which is firmly combined with the base material and has strong anti-corrosion ability;