●Dimensions: 1140 X 865 X 830mm ●Main material: steel pipe ●Installation method: direct buried ●How to use: Hold the armrest with both hands, abdomm. Close to the backing board, step on the pedal tube with your feet, straighten your legs, move your body forward to the upper tube, bend your upper body downwards, and lift it up until your body is straight ●Main function: exercise the muscle strength of the abdomen, waist and back.