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Office chair swivel chair / Staff or task Office chairoffice; A. Product Construct feature:1. Back:Mesh -Nylon outside frame;2. Arm: fixed armrest pole and PP armpad;4. Seat: fabric upholstery- Knee-tilt back & seat;5. Mechanism: simplemechaism, height adjustable handle,lock and unlock handle6. 120mm height adjustable gasspring for seat height up and down;7. 320mmRadiusNylon baseand 2."nylon castors;8. chair dia. below:Model# 561-1Chair Dia.:Height:87/95.5cmSeat Width:47cmSeat Depth:47.5cmSeat Height:45.5-53cmPacking Box Size:58*32*57.5cm, 1pc/box- knock down packingLoadability:262pcs/20', 630pcs/40'HQ B. Our factory approved ISO9001;C. The chair has2 years warrantee.