Chair with a 5 way nylon fibre reinforced swivel base (black or white) mounted on self-braking castors (in the same colour as the base, with soft or hard tread). High backrest with exposed backshell in the same colour as the base with front face upholstery in polyester mesh (black or white). Seat upholstery available in fabric, leather, coated fabric, or customer’s material. 3D nylon adjustable armrests (black or white) with TPU pads in two sizes are available upon request and with a surcharge. Mechanisms: - Gas-lift piston for height adjustment. - Built-in self-tensioning weight response mechanism and backrest with 5-position recline. - Up&down of the backrest with 5-position recline, breathing up to 64 mm and built-in lumbar support. - Sliding seat with 5-position adjustment, breathing up to 50mm.