Wheelchairs and Accessories :: 18" Aluminum Viper Plus Gt- Deluxe High Strength, Lightweight, Dual Axle, Built In Seat Extension, 3 Ft. Ramp, Invacare Insignia 18" X 18" Frame W/Convertible, Adj Height Arms, Footrests And Flat-Free Tires Whee, 22" Transport Chair With 12 Inch Rear Wheels, Bariatric Steel Transport Chair, Aluminum Viper Plus Gt-Deluxe High Strength, Lightweight, Dual Axle, Built In Seat Extension