Executive Office Swivel chair for manager or boss in office;A. Product Construct feature:1. Head: Alu support with PU or fabric upholstery (match back & seat fabric or PU color), PU moulded head foam;2. Back: Inner & outer PP back with PU or fabricupholstry, PU moulded foam to be goodshape,inner with upholsteried back easily to assemble to outer piece;3. Die cast Alu support connecting back and seat in silver powder coating;4. Arm: Height adjustable armrest pole in silver powder coating and PU armpad;5. Seat: PU moulded foam and PU or fabric upholstery- Knee-tilt back & seat;6. Mechanism: synchronize 4position lock mechaism, height adjustable handle,lock & unlock handle;7. 85mm height adjustable gasspring for seat height up and down;8. 350mmRadiusNylon baseand 2.5" PU castors;9. chair dia. below:Model# 912A-01Chair Dia.:Height:124/132.5cmSeat Width:48cmSeat Depth:47cmSeat Height:48-56cmPacking Box Size:72*37*64, 1pc/box- knock down packingLoadability:168pcs/20', 384pcs/40'HQ B. This series is cheaper than 900series;C. Our factory approved ISO9000;D. The chair has 3 years warrantee.