The seat and backrest are covered with specially-made leather or a wide range of coloured fabric. The back of the backrest is covered with black plastic. The height of the chair may be adjusted by using the pneumatic cylinder. An anti-shock synchro mechanism “Tatto” provides 4 operating positions. Other adjustments include backrest height adjustment, tilt angle and stiffness control. The armrests are adjusted to three directions, and come in a choice of black or polished aluminium with polyurethane armpads. For the base, there is an option of black polyamide or chromed aluminium. Also, the 65 mm castors are suitable either for soft or for hard flooring.