The seat and backrest are covered with leather or a wide range of coloured fabric. The height of the chair may be adjusted by using the pneumatic cylinder. An anti-shock synchro mechanism provides 5 operating positions. Other adjustments include backrest tilt angle and stiffness control. If armrests are desired, fixed black plastic armrests are available. For the base, there is an option of black polyamide or chrome aluminium. Castors are suitable either for soft or for hard flooring.