Safetysure Wheelchair Board 16 L x 16 W Casting Supplies * This unit comes standard 01804 * This unit comes standard with specially designed shelves that facilitate the easy removal of the four included glacier packs 3 4 mm 5 6 mm 7 8 mm 9 10 mm 11 12mm 13 14 mm 15 16 mm 17 18 mm Shipping Carton Size: 12 L x 10 W x 9 H 16 L x 16 L * Provides flat sitting surface and eliminates the hammock effect associated with traditional wheelchair seats * Made of lacquered finished plywood * Corners and sides are rounded to prevent chipping * Makes an excellent sitting surface when combined with a pressure relief cushion * Splinter free plywood * Weight capcity : 300 lbs *