SONATA operator swivel chair, with adjustable head rest, fabric cover in black. Supplied = flat pack. Cover material = fabric. Colour of covering = black. Frame colour = polished aluminium. Frame material = aluminium, polished. Seat mechanism = rocker mechanism with counter weight adjustment, adjustable seat inclination. Frame design = with castors. Height adjustment range = 460 - 555 mm. Type of arm rests = with arm rests. Back rest height = 735 mm. Seat depth = 540 mm. Seat width = 510 mm. Conforms to = fire safety standard EN 1021, part 1 + 2. Model = height adjustable head rest. Design of castors = castors for soft floors. Max. load = 150 kg. Product type = operator swivel chairs. Ergonomically shaped back rest. Fixed ring arm rests. Innovative multiblock mechanism for optimum damping and locking of the seat inclination in five positions. Individual weight adjustment, max. load up to 150 kg. Five-star base made of polished aluminium with large castors for carpeted floors. Available as an office swivel chair with a soft leather cover, or as a control centre chair with a fabric cover made of 50% nylon, 30% new wool, 20% linen. Tested in accordance with Remodex BS5459-2. Castors for soft floors as standard. Supplied flat pack - easy self-assembly.