●Dimensions: 1915 X496 X 1802mm ●Main material: steel pipe ●How to use: Lie on your back on the sloping board with your arms straight, hold the support behind your head with your hands, keep your upper body fixed, and stretch your legs up to do abdomen and leg lifts. ●Main functions: improve the strength of the waist and abdomen, expand the chest, and enhance the respiratory function.