Flash Furniture Mid-Back Transparent Black Mesh Executive Swivel Chair with Synchro-Tilt Mechanism Contemporary Office Chair Mid-Back Design Coat Hanger Bar on Back Ventilated Mesh Material Transparent Black Mesh Seat and Back Built-In Lumbar Support Molded Seat and Back 2-to-1 Synchro Tilt Adjustment Tilt Tension Adjustment Knob Swivel Seat