HP-2B04 Air Ambulance Stretcher Collapsible Mattress For Sale Used For EMS Rescue1)The main material is high strength aluminum alloy which is hardened and surface treated. 2)The folding mechanism of the leg part can be controlled by the handles on both sides. Only one medical staff is needed to push the stretcher into the ambulance car. 3)Equipped with polymer plastic adjustable guardrails and two safety belts for the convenience and safety of patient transport. 4)Universal wheels at front adopts elastic latch mechanism, the