... Offer surface treatment of Galvanization as require Outdoor fitness equipment- Sit-up board( Single ) Material: steel ( Galvanization available )Dimensions ... (mm)Weight: 32KGVolume: 0.6CBMFunction: To strengthen the muscles of abdomen and hip. Function and advantage: Developing ... Instruction:Lie back on the board,feet on the horizontal bar,hold handles aside with both hands,sit-up and bend front,repeat ...