MaterialSit-up aids are made of natural environmentally friendly silicone, which is non-toxic and harmless. The thickened silicone suction cup has a larger bearing area. More stable, safe and healthy exercise. Size25.5*15.5cm/10.039*6.10inch Functionthe mufti-functional sit-up bar with 3 adjustable gear positions to meet different family member fitness requirements.A set of equipment can carry out a variety of sports,such as sit-ups,flat support,push-ups and so on, variety of fitness methods. BenefitsThe sit-up bar equipment occupies small area and is easy to use.It is durable to use.It can help you to Exercise your Abs core muscles, Reduce abdominal fat, shape your body, complete a variety of actions easily. Easy Assembly&ReusableAssembly is easy and quick, simply take a few minutes and start your ab workout. Can be reused on smooth floors--tiles floor concrete, cured or any other smooth floors. The surface of the wooden floor should be smooth, withoutanti-skid stripes, and the ground should be flat. Log floors and uneven polished floors are not recomme