Round Stool Base Design 5-Star Mobility Mobile Backrest No Base Color Black Built-In Tool Tray Yes Includes Footring No Maximum Seat Height 22 1/2 in Minimum Seat Height 18 in Overall Height 20 in Seat Adjustment Type Pneumatic Lever Seat Diameter 14 in Seat Shape Round Seat Width Not Applicable ESD Conductive No Assembled Unassembled