EXECUTIVE AND OPERATIVE CHAIR Synchro Mechanism (Backrest tilt with regulator or degrees of tilt of the seat) with 4 locking positions with jiggle system. Tension control to suit body weight. Gas lift height adjustment, chrome finish. Injected polyurethane moulded foam seat, density 40 Kg/m³. Multiply wood inner seat, with fully upholstered seat base. Injected polyurethane moulded foam back, density, 35 Kg/m³. Multiply wood inner backrest, with fully upholstered back shell. EXECUTIVE, chair with high bachrest including headrest. OPERATIVE, chair with medium bachrest. Depth adjustment tools needed Manufactured in polish aluminium. Fixed height. Polished aluminium base. Double wheels Ø 50 mm in black nylon with and chromed covers. Polished aluminium armrests with black poliuretene supports. Width adjustment (tools needed