Breathable Light Air Grid Seat and Back with Adjustable Lumbar Support Pneumatic Seat Height Adjustment 2to1 Synchro Tilt Control with Adjustable Tilt Tension 4Way Adjustable Flip Arms with 3Position Lock & PU Pads Heavy Duty Platinum Coated Base with Black End Caps and Oversized Dual Wheel Carpet CastersBreathable Light Air Grid Seat and Back with Adjustable Lumbar SupportPneumatic Seat Height Adjustment2to1 Synchro Tilt Control with Adjustable Tilt Tension4Way Adjustable Flip Arms with 3Position Lock & PU PadsHeavy Duty Platinum Coated Base with Black End Caps and Oversized Dual Wheel Carpet Casters