SPEED-O office swivel chair, membrane back rest, black, without arm rests. Supplied = flat pack. Cover material = polyester. Colour of covering = black. Back rest colour = black. Frame colour = black. Frame material = plastic. Seat mechanism = adjustable seat inclination, synchronous mechanism. Frame design = with castors. Height adjustment range = 390 - 510 mm. Type of arm rests = without arm rests. Back rest height = 580 mm. Fittings = counter pressure setting, lumbar support. Seat depth = 400 - 450 mm. Seat width = 490 mm. Shape of seat shell = contoured seat. Conforms to = GS. Design of castors = universal castors for soft and hard floors. Max. load = 110 kg. Product type = operator swivel chairs. Perforated backrest shell that allows air to circulate. Seat depth adjusted using sliding seat (5 cm) Synchronous mechanism with double lock. Integrated seat angle adjustment (-3°) Large plastic five star base, 700 mm. Universal castors for soft and hard floors. Office swivel chair with membrane back rest and black mesh covering, auto synchronous mechanism (AU) with seat angle and seat depth adjustment. Large five star base, 700 mm. Universal castors for hard and soft floors. The materials used are one single type, or recycled, and are up to 99% reusable. The packaging has been kept to a minimum, which saves space and money, and protects the environment. Supplied flat pack - easy self-assembly.