Allows Individual To Turn Up To 360o * Makes Getting On Or Off A Seat Or Chair Easy And Comfortable - Car Seats Too! * Durable And Stable With An 300 Lb. Weight Capacity * Portable: Weighs Only 3 1/4 Lbs. * Diameter: 15 5/8 * 1 Year Limited Warranty Shipping Carton Size: 18 L X 17 W X 5 H