Ergonomic wooden chair, fireproof treatment. Height adjustment system by gas piston. Height of the seat at extended piston 48cm, height of the seat at retracted piston 35cm. 5 spokes stand for a perfect stability. Contoured seat to increase operator’s comfort. 360° pivoting. Back adjustable in height and depth simply unscrewing the easy access knob. Seat dimensions 40x37cm. The chair is realized with quality materials to assure a grand durability.