The Deluxe Heavy-Duty Emergency Evacuation 2-Wheel Stair Chair has an extra sturdy 2" tubular frame in bright yellow for easy visibility. It features two 4.5" rear wheels that make easier transportation on most surfaces. Front and back handles provide easier handling. The back two handles are used to support the chair while moving the patient and are non-locking for an upward lift. The front two handles telescope out to 14 ÃÂ¼ inches, and lock into place to provide the best possible leverage when lifting the patient. The Stair Chair comes with a heavy duty black all-impervious vinyl seat and backrest that is durable and easy to clean. A heavy duty, 2" crossbody, quick release restraint straps provide extra safety to the patient during transport or while moving up or down stairs. Safety straps should always be used while a patient is in the chair. It is recommended to always use the Heavy Duty 2-Wheel Evacuation Stair Chair with two people for added safety. Measures 41 x 21.5 x 31 inches and has a weight capacity of 400 pounds.