Value. Performance. Quality. Who was it that decided a mesh chair should break the company budget. Lumbar Support, lumbar pad adjust vertically through a 4? range. Independent adjustable armrest, 2.5? range by single touch technology. Pneumatic lift control adjust height from 16? to 19?. Tilt tension control knob, let?s you control the amount of resistance when leaning back in the chair. This chair offers a 2:1 Synchronous tilt back, knee tilt mechanism.