The K4 Basic Lightweight Wheelchairs by Medline are available in a variety of setups. These wheelchairs all feature light weight frames, with swing back, desk length arms. The K4 has smooth-rolling solid, flat-free tires, comfortable black nylon upholstery, and a robust frame. The seats are available in depths of 16" or 18", with widths of 16", 18" and 20". The K4 weight capacity supports 300 lbs and weighs 33 lbs.