The Deluxe Swivel Seat from Invacare Supply Group swivels a complete 360º for smooth, easy movement in any direction while seated. It is made of a comfortable polyfoam with a removable, machine washable cover and it has a durable plastic non-skid base. It is great for getting in and out of vehicles and for use at home or the office. The seat weighs just 2.5 lbs. and has a 15" diameter.