Flash Furniture Mid-Back Black Fabric Multifunction Executive Swivel Chair with Adjustable Arms Contemporary Office Chair Mid-Back Design Black Fabric Upholstery Built-In Lumbar Support Triple Paddle Control Mechanism Back Height Adjustment Back Adjusts 2.5'' up and down Forward Tilt Control Knob Infinite-Locking Back Angle Adjustment 2-to-1 Synchro Tilt Adjustment