Product Description Size: 27.0 cm * 12.0 cm * 13.0 cm Color: black Material: high-quality steel pipe + high-density foam + natural rubber + PP + spring + accessories Package content: 1* sit-up aid 1.Multi-Functional Sit Up Bars This sit up equipment can perform a variety of sports, perfect for sit-ups, push-ups, Pilates, stretching, yoga, strength training. Can achieve training abdominal muscle and psoas, thin waist, reduce belly fat and other fitness effects. 2. Meet The Ergonomics Eesign This sit up training device has a sturdy steel frame structure, soft high-density foam handle and durable rubber thick suction cup, strong suction power, firm and safe, which is very comfortable and durable. It has 4 gears of height adjustment and you can adjust the height for a variety of purposes to help you complete abdominal exercises and beautify your abdominal curves. 3. Portable & Light WeightLight weight and portable design, this sit-up aid saves space and is ideal for storage and transportation anywhere. You can use it at home, office or travel to exercise and shape your body. 4. Easy to Install The foot sit up bar is very easy to install at home, no tools are needed, just need a smooth and seamless floor. Please press the foam padding with one hand and then push the wrench down. Lastly, make sure it is firmly attached. Do not use for more than 1 hour each time.(Note: Make sure there are no gaps in the bottom Otherwise, the sucker will not stick to the floor.) 5. About Wooden Floors: The surface of the wooden floor should be smooth, without anti-skid stripes, and the ground should be flat. Make sure there are no gaps in the bottom. Do not press the floor seam, otherwise it will be unusable. Log floors and uneven polished floors are not recommended