Aluminum Alloy Fold Stair Stretcher With the aluminum alloy material,and the flexible &light structure,it can be folded easily for carrying the patients who has tracture in the stair. Technical Parameters: Max.unfolded Size:(L*W*H):50*41*85cm Max.unfold Size:(L*W*H): Aluminum Alloy Fold Stair Stretcher With the aluminum alloy material,and the flexible &light structure,it can be folded easily for carrying the patients who has tracture in the stair.