SPEED-O office swivel chair, membrane back rest, black, with 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 = with 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