HON Height-Adjustable T-Arms for Volt Series Task Chair, Black (5795T) ADJUSTABLE ARMS: This set of 2 T-shaped arms for use with Hon's Volt series of task chairs will keep your upper body comfortable and supported all day long POLYURETHANE: We craft our arms out of high quality molded polyurethane so they last for years to come but keep you covered with our HON 5-year Limited Warranty just in case something goes wrong EASILY ADJUSTABLE: Use the side levers to easily adjust the arm height to suit your specific needs VARIABLE HEIGHT: These height adjustable arms measure 12 inches wide by 6-1/2 inches deep by 11 inches high VOLT COMPATIBLE: Level up your Volt Task Chair with these height-adjustable arms and customize your chair for your personal comfort