Designed to bring long lasting comfort and support. Intensive multi-shift 24 HR use and/or users up to 350 lbs on selected models Select Dexter Petite or Dexter 24 HR for the right fit Heavy duty Synchro-tilter, with five position tilt lock. Features an anti-kick back, locking device to prevent accidental release of mechanism Durable polypropylene Black back shroud protects outer back from damage Standard with Schukra™ depth adjustable lumbar support Selected models offer concealed full ratchet back/lumbar height adjustment over 2. 5" with seven position Multi-depth seat adjustment, seat slider with spring return offers 2" of adjustment to suit tall and short users Width adjustable arms add up to 4" of additional seat width 3N height adjustable T Arms High density Ultracell foam on seat