Wab Board 1.National Patent 2.Size:1600x1350x650mm 3.Material:Steel+Aluminium+Wood 4.Model: HK-35045.Function: Exercise waist muscle, ease strain of waist and back, promote blood circulation.6.Approach: Sit on the board, the feet grip the ground pipe. Hands enbrace head incross and lie down on the back, do sit-up . Fitness Equipment (Wab Board)