V1 office swivel chair, mesh covered back rest, black/black. Supplied = partially assembled. Cover material = polyester, Trevira CS, flame retardant. Colour of covering = black. Back rest colour = black. Frame colour = black. Frame material = nylon. Seat mechanism = synchronous mechanism. Frame design = with castors. Height adjustment range = 450 - 570 mm. Type of arm rests = without arm rests. Back rest height = 580 mm. Seat depth = 480 mm. Seat width = 480 mm. Shape of seat shell = flat seat. Conforms to = DIN EN 1335 part 1 - 3, DIN EN 12527+DIN EN 12529. Model = mesh 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 an actively breathing looped fabric, adapts to the spine and provides support in all positions, with adjustable height and inclination. Synchronous mechanism with safety release for synchronous adjustment of the seat and back rest inclination, spring force setting of the back rest inclination can be adjusted to the respective body weight, extra large opening angle. Open back rest shell. Flat seat with knee roll. Synchronous mechanism. State-of-the-art, trendy office chair with open back rest shell, 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 flat seat with rounded front seat edge (knee roll) Infinitely adjustable seat height with Toplift. Large black plastic five star base, featuring load dependent braking and large designer double safety castors for carpeted floors. Covered with actively breathing looped fabric. Newly designed WINDOW back rest covered with high quality 3D mesh/looped fabric. Synchronous mechanism with safety release for synchronous adjustment of the seat and back rest inclination. 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.