Office Star Beathable Mesh Seat and Back Managers Chair with Padded Flip Arms and Titanium Accents, Black Breathable Mesh Seat and Back with Built-In Lumbar Support One Touch Pneumatic Seat Height Adjustment 2-To-1 Synchro Tilt with Adjustable Tilt Tension Padded Flip Arms with Coated Accents Heavy Duty Base with Coated Accents and Dual Wheel Carpet Casters