Round Stool Base Design 5-Star Mobility Mobile Backrest No Base Color Black Built-In Tool Tray Yes Includes Footring No Maximum Seat Height 20 1/2 in Minimum Seat Height 15 1/2 in Overall Height 20 1/2 in Seat Adjustment Type Pneumatic Lever Seat Diameter 16 in Seat Shape Round Seat Width Not Applicable ESD Conductive No Assembled Unassembled