Operator swivel chair, back rest height 550 mm, point synchronous mechanism, flat seat, black seat, black mesh back rest. Supplied = flat pack. Cover material = polyester, Trevira CS, flame retardant. Colour of covering = black. Back rest colour = black. Frame colour = polished aluminium. Frame material = aluminium, polished. Seat mechanism = synchronous mechanism. Frame design = with castors. Height adjustment range = 440 - 560 mm. Type of arm rests = without arm rests. Back rest height = 550 mm. Fittings = lumbar support. Seat depth = 480 mm. Seat width = 480 mm. Shape of seat shell = flat seat with knee roll. Conforms to = DIN EN 1335 part 1 - 3, DIN EN 12527+DIN EN 12529. Design of castors = castors for soft floors. Max. load = 110 kg. Period of use/day = up to 8 hours. Product type = operator swivel chairs. Easy care Trevira CS fabric cover - flame retardant. Meets fire safety standard EN 1021, parts 1 + 2. Mesh back rest made of 100 % polyester. Aluminium frame, polished. Castors for soft floors as standard. Your advantage With mesh back rest and ergonomic flat seat with knee roll.