Asynchronous ergonomic operator chair Posture curved backrest & contoured seat Waterfall seat front alleviates pressure on the thighs aiding circulation 4 lever asynchronous mechanism Seat slide adjusts the depth of the chair to the users leg length Forward ergo tilt seat Back angle adjustment Back height adjustment positions the backerst at the optimum height Gas lift seat height adjustment Optional height adjustable armrests Arm height allows the chair to fit under a desk/table of 690mm high Suitable for use 12 hours per day Maximum user weight 120 Kg Choose from black nylon base or polished steel base Delivered flat packed for easy self assembly 1 Year manufacturer's guarantee