With an 18" wide seat cushion and an 8" high back, your throne will provide wonderful support! Comfort for hours on end, whether you're cleaning your wheels, waxing the side of your car or bleeding your brakes. There are five 2 1/2" casters for greater stability and roll over any surface! Three pie shaped compartments in the lower tray keep your parts and fasteners separated. Raise or lower the height pneumatically from 17" to 22". Enjoy the comfort of being at just the right level!