V3 office swivel chair, upholstered back rest, black/black. Supplied = partially assembled. Cover material = Trevira CS, flame retardant. Colour of covering = black. Back rest colour = black. Frame colour = polished aluminium. Frame material = aluminium. Seat mechanism = synchronous mechanism, adjustable seat inclination. Frame design = with castors. Height adjustment range = 440 - 540 mm. Type of arm rests = without arm rests. Back rest height = 580 mm. Seat depth = 490 - 550 mm. Seat width = 490 mm. Shape of seat shell = lumbar support seat. Conforms to = DIN EN 1335 part 1 - 3, DIN EN 12527+DIN EN 12529. Model = upholstered back rest. Design of castors = hard castors for soft floors. Max. load = 110 kg. Period of use/day = up to 8 hours. Product type = operator swivel chairs. State-of-the-art, trendy office chair with open backrest shell and covered with high quality, lined padding, adapts to the spine and provides support in all positions, with adjustable height and inclination. Ergonomic seat for healthy and relaxed sitting, incl. seat depth and seat inclination adjustment, can be adjusted independently of each other, recommended for people both large and small. Ergonomic seat. Seat depth and seat inclination adjustment. Synchronous mechanism. Aluminium five-star base, polished. State-of-the-art, trendy office chair. Adapts to the shape of the back and provides support in all positions. Height and inclination are adjustable, thereby optimal adaptation to any body size. Comfortable ergonomic seat for healthy and relaxed sitting. Infinitely adjustable seat height with Toplift, chrome plated. Synchronous mechanism with safety release for synchronous adjustment of the seat and back rest inclination. Extra large polished aluminium five star base, featuring load dependent braking and large designer double safety castors for carpeted floors. With an open backrest shell covered with lined fabric. Newly designed WINDOW back rest covered with high quality, lined padding. Incl. seat depth and seat inclination adjustment, can be adjusted independently of each other, recommended for people both large and small. Spring force setting of the back rest inclination can be adjusted to the respective body weight (using a hand wheel) , extra large opening angle. This model is endorsed with the GS symbol issued by Intertek Frth and meets all safety relevant prerequisites in this context. Supplied flat pack - easy self-assembly.