Sit-up Assistant Device Exercise Adjustable Body Equipment Product Details Sit-ups Assistant Device Home Fitness Healthy Abdomen Lose Weight Gym Workout Exercise Adjustable Body Equipment 1. Small size, not occupy space, lightweight storage. 2. Thick soft foam, soft and comfortable without hurting the feet. 3. A key switch, start three seconds. Waterproof and moisture proof, safer to use. 4. Third gear height, free to adjust. Through the spring snaps freely adjust their comfort level. 5. Strong suction, diameter 13.5cm after increased , refused to loosen. Place of Origin Thailand Directions N/A Ingredients N/A