Convoluted Wheelchair Cushion w Back & Blue Polycotton Cover Casting Supplies Medium Joint Size 14 x 14 Color:Red Medium Joint Size 14 x 14 * Designed for Arthritis sufferers * New Four Stage Therapy Switch provides optimum 20 minute treatments * Simple one touch control features auto shut off timer * Produces intense moist heat without adding water * Fast acting therapy relieves pain and stiffness for hours * Shipping Carton Size: 16 L x 12 W x 4 H 5 wrist circumferences * Unit warranty 2 years * Cuff warranty 1 year * Includes storage case * Includes 2AAA batteries * Convoluted foam with 2 back fits comfortably in most chairs * Cushion folds in half for convenience in storing and handling * Cover is removable and washable * Durable polyurethane foam * 18 X 16 X 2 Seat