Specification Brand : wsdjonith BulletPoint1 : The lightweight and easy-to-use aluminum alloy ladder stretcher is mainly used to evacuate patients in multi-story buildings. BulletPoint2 : A belt system allows the chair to slide over the edge of the stairs while creating friction to slow momentum. BulletPoint3 : Head and chest restraints secure the patient to the chair. BulletPoint4 : Can be used on flat surfaces. Used to evacuate people from multiple flights of stairs. BulletPoint5 : One person can operate the stairs ( 175pounds). If the patient weighs more than 175pounds please 2or more operators. There are on the steep stairs 2or more operators. ExternallyAssignedProductIdentifier : 7592757242664 ItemName : Multifunction Stair Chair Portable Foldable Stair Stretcher Lift Stair Chair Ambulance Firefighter Evacuation Lift Stair Chair with Quick Release Buckles ItemTypeKeyword : stair-lifts Manufacturer : wsdjonith MetalType : other PartNumber : tJhs987630 ProductDescription : Thickened and extended rubber tracks make it easy to open and close with a light press. The track is designed to counteract gravity and use friction to slow down the descent. Stable and won't bump on stairs. Features: Suitable for transporting patients up and down stairs in high-rise buildings. Only one person can operate. Four-wheel structure, easy to control. The stretcher is equipped with two safety belts to ensure the safety of the patient during transfer. The stair evacuation chair is made of high-strength aluminum alloy material. It has the characteristics of light weight, easy to carry, easy to disinfect and clean, easy to carry and safe to use. Commonly used in hospitals, gymnasiums, ambulances, and military hospitals to transport sick and injured patients. Product name: Stair evacuation chair Material: aluminum alloy Size: Before folding:7852134cm After folding:785222cm weight:9kg Carrying capacity:159kg Packing List: 1Foldable stair chair