This series of stairway chair stretchers are made of high-strength aluminum alloy or stainless steel materials, which can be folded and save 78% space in different emergency places. These chairs also known as carrying chairs, transit chairs, evacuation stair chairs, etc. are featured with light-weighted, small-sized, easy-carried, use-safely and easy for sterilization and clean. They are ideal facilities for emergency staff to transfer patient to upstairs and downstairs.