Air-Cell Low Profile Wheelchair Cushion, Low Profile Dry Flotation Positioning and Therapeutic Seat with Cover, 18in (W) x 16in (D) x 2.25in (H) (will fit both 18in and 20in wheelchair). Features interconnected air cells (10 cells (W) x 9 cells (D)) which provide an adjustable, low deformation, counter-pressure environment that assists in healing of ischemic ulcers. Cushion is provided with inflation pump.