Features:Small and practical,it doesn't take up space,and you can exercise at home.Don't have to pay for equipment or go to the gym.You don't have to take the time to do it at home.A variety of fitness methods,for different parts,where to thin where to practice.A set of equipment can carry out a variety of sports,such as sit-ups,flat support,push-ups and so on.Specifications:Material:Cold rolled steel + Foam + RubberSuction cup diameter:12cmAdjustable height:18-21cmGear height:3 gears adjustablePackage included:1pc x Sit-ups Assistant Devicelt can be used at home or in the office to shape your body and trim your waist. Also very suitable for travel. The perfect gift for people to have a healthier life, especially for those who don't have time to work out in the gym or gym. This is a very ideal portable exercise tool that saves time and money.