Because of its strong engineering background, ACCESSAIR Systems' offers one of the most innovative self-propelled passenger airstairs and one of the most extensive options list in the industry. ACCESSAIR's basic APS model features rust-proof back fenders fabricated of composite material, galvanized side panels, six stabilizers and access to aircraft with doorsills up to 228 inches. Total passenger comfort, and coverage from the elements, is available by means of polycarbonate covers and top and/or bottom canopies which fully cover the doors of aircraft and airprot buses.