HP-2G Air Ambulance collapsible stretcher Automatic loading Designed For Ambulance1)The main material is high strength aluminum alloy which is hardened and surface treated. 2)The height of front part, back part and the whole stretcher can be adjusted in 12 positions. The loading height is 62 64cm. 3)Equipped with aluminum alloy adjustable guardrails and two safety belts for the convenience and safety of patient transport. 4)The mattress is seamless welded with sealed high density polyethylene coated nylon material, its waterproof,