The two-row support rods provide greater heel force and double efficiency. High density soft foam-covered handle provides comfortable padding which regulates traction on the back of the feet during the workout and protects the ankle from injuries. Double suction cups are made of thickened rubber, which provides a larger suction cup area and higher stability. Four height adjustments, which can be adjusted according to your needs, suitable for different people. This sit up assistant device is the best helper in abdominal movement, push up, sidekick, sit-ups, backstretch, elbow plank, hip bridge, crunches and other sports. you can workout anytime. The fitness assistant device is easy to install and remove. It suits for any dry and clean flat ground. colour: red Material: cold rolled steel + high-elastic foam Size: 23x5x12cm Package Contents: 1 x Portable Sit up Machine Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.