[ERGONOMIC UPGRADE DESIGN] - The two-row support bars offer higher heel force and double the efficiency. The high-density handle, covered with soft foam, provides comfortable padding that regulates traction on the back of the feet during exercise and protects the ankle from injury [HIGHER STABILITY AND EXPANDABLE HEIGHT FOR MORE PEOPLE] - Double suction cups are made of thickened rubber with a diameter of 8.7 inches, which provides a larger suction cup area and greater stability. Four height settings that can be adjusted to your needs, suitable for different people. [MULTIPURPOSE SIT UP BAR] - The sit-up assistant device is the best helper for abdominal movements, push-up, side kick, sit-ups, back extension, elbow plank, hip bridge, crunches and other sports. You can work out anytime. [IT DOESN'T WORK ON RAW WOOD FLOOE] - This perch can be used repeatedly on slippery floors or surfaces. Clean the surface before use and put the suction cup on when using. Remove dust or dirt from the rubber base of the suction cup. Keep the rubber moist so the suction cup can secure the device more firmly to the floor. Product description: Type: double suction cup Color: Black Material: foam + steel Size: 25x22cm Package contents: 1 x sit-ups 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.