The product is made of high quality aluminum alloy material, with the foam mattress, light weight, safe and reliable. 2.With two castors on front of the stretcher, it can be adjustable according to the different ambulance height. 3. With a safety lock device,it must be open when the stretcher goes up and down the ambulance, locked when moves on the floor. 4. By controlling two handles,just one person is able to operate,and make the patient safe and comfortable. 5. With the fixture, it can lock the stretcher after inside the ambulance.