The Performance W85008 Roll-Around Stool with Pneumatic Seat adjusts to 20 inches high quickly and easily. Features: * Pneumatic action adjusts seat to 20-inch height quickly and easily * Minimum seat height 15.5-inches * Convenient 15-inch diameter tool tray * Shielded 2-1/2-inch casters * Fully-padded 12-inch diameter seat What"s In The Box: * Performance W85008 Roll-Around Stool with Pneumatic Seat