The seat upholstered with fabric, the backrest – with special mesh ( a wide range of colours ). 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 or adjustable black plastic armrests are available. For the base, there is an option of black polyamide or polished aluminium. The castors are suitable either for soft or for hard flooring.