The K4 Basic Lightweight Wheelchairs, 20", Swing Back Desk Arms, Swing-Away Footrests, is a durable, tig-welded frame with gray powder coat finish. Swing-back arms with easy flip back arm release. Dual axle hemi-height adjustable; adjustable-height back. Smooth-rolling solid flat-free latex tires. Comfortable nylon upholstery Arm style: swing back desk length; Leg styles available: detachable footrest and detachable elevating footrest Seat sizes come in: 16 x 16" (41 x 41 cm), 18 x 16" (46 x 41 cm) and 20 x 18" (51 x 46 cm) 1 Count