With the aluminum alloy material, and the flexible & light struclure, it can be folded easily for carrying the patients who has fracture in the stair. Technical parameters: Product Size(L*W*H): 62*52*90cm Folding Size(L*W*H): 18*54*90cm Packing Size: 21*54*93cm N. W.: 11kg G. W.: 12kg Load Bearing: ≤159kg