This replacement back upholstery is designed for Invacare Tracer IV wheelchairs, available in 16", 18", 20", 22", and 24" sizes. It comes complete with mounting screws and countersink finish washers, making installation quick and hassle-free. Simply remove the old seat back and secure the new one with the eight included screws and washers for a refreshed and comfortable seating experience. Ideal for restoring the comfort and functionality of your Invacare Tracer wheelchair.