Coccyx Cushion Foam 18 x16 x2 Navy Eating Aids Air Insert: 18 Month Limited Warranty Color:Yellow Air Insert: 18 Month Limited Warranty specs * Available in 3 attractive colors: Blue Ridge Jade and Rosewood * D578 Model features newly designed back support to provide maximum comfort * 75 Up Charge) * Relieves pressure at the sacral area while offering patient s comfort and even distribution of weight throughout the cushion * Medium density fire retardant foam is covered in either a poly cotton in your choice of black navy or gray medical grade vinyl Navy * 18 W x 16 D x 2 * Custom sizes available * Optional solid seat inserts available ($8