Office Chair with Air Grid Back and Mesh Seat Breathable Air Grid Back and Black Mesh Seat Adjustable Lumbar Support; 2 Way Adjustable Arms with Soft PU Pads; Mid-Pivot Knee Tilt; One Touch Pneumatic Seat Height Adjustment; Gunmetal Finish Aluminum Base with Dual Wheel Carpet Casters; Thickness 4; Shipping Method UPS; Color Black; Materials Air Grid/Metal; Assembly Required Yes; Series 63 Series; Arms With; Feature Type Height 45.5 in.; Feature Type Width 27.25 in.; Feature Type Length 30 in.; Depth 21; Material Air Grid, Metal Assembly Yes; Style Modern; Finish Black