Wheelchair Accessories - 18"x16"x2 Low Medline Pep Air Cell Wheelchair Cushion: 18"x16"x2 Low Interconnected Air Cells Adjust to the Contours of the Body The Positioning Equalization Pad has a proven design that provides maximum pressure relief by utilizing interconnected air cells that adjust to the contours of the body. Adjustable air pressure (pump included) provides customized seating based on the individual needs of the user. The product's low surface tension reduces skin shear. Includes a fluid-proof, easy-to-clean, anti-shear cover. 18-month warranty.