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