Office Star High Back Mesh Screen Back and Seat, Locking Tilt Control and Polished Aluminum Arms and Base Office Chair High back mesh seat and back One touch pneumatic seat height adjustment 2-to-1 synchro tilt control with adjustable tilt tension and tilt lock and mid pivot knee tilt Heavy Duty Polished Aluminum Finish Base with Oversized Dual Wheel Carpet Casters Black deluxe mesh fabric