Professional Dual Function Ergonomic AirGrid® Back and Mesh seat Chair with Gunmetal Finish Accents. Thick Padded Contour Mesh Seat and Breathable AirGrid® Back with Adjustable Lumbar Support. One Touch Pneumatic Seat Height Adjustment. Dual Function Control with Adjustable Tilt Tension. Height Adjustable Arms with PU Pads. Gunmetal Finish Aluminum Base with Dual Wheel Carpet Casters.