High back chair ergonomically designed for complete lumber support, seat is made of hot pressed moulded ply 12 mm thick and upholstered with PU foam 45kg/ M3 density and back made of double layered moulded hot pressed 18mm thick twin ply and upholstered with PU foam 32kg/ M3 density and leatherite tapestry . Seat and back are joint with HR sheet 63mm X 8mm HR steel powder coated. Arms are made of wooden with cushion and Arm are joint with back, 8mm bright bar with chrome plated are fix both of arms outer side.The mechanism is synchro knee tilt (four position locking). The pedestals shall be made of HR steel 2mm thick, chrome plated fitted with 5 nos. twin wheel castors made of injection moulded black nylon. The pneumatic height adjustment shall have an adjustment of 65mm in BIFMA Standard class 3. The pedestals shall be made of HR steel 2mm thick, chrome plated fitted with 5 nos. twin wheel castors. The pedestal dia shall be 65+/-0.5cm and the pitch centre dia shall be 75+/-1cm (with castors). The twin wheel castors shall be injection moulded in black nylon. Seat Size shall be = 20x19 inch, Back Height from seat- 25" and handle to handle distance- 28.5".