Save the Knees with RACATAC - Work on brakes, detail wheels, stripe and apply graphics in greater comfort than you thought possible. The unique design of the RACATAC supports the back while taking pressure off knees, ankles and toes. Weighs only 8 lbs. but supports up to 300 lbs. Uses 5 polyurethane ball bearing casters. Curved frame is constructed from 1/8in. thick aluminum. Bicycle style seat adjusts from 11-1/2in. to 15-1/2in. tall, 3in. horizontally and tilts. A 7in. by 15in. removable tray provides handy storage for tools and parts. One year manufacturer's warranty. Please allow 10 days for delivery.