Office Star Mid Back Eco Leather Seat and Back, Locking Tilt Control and Polished Aluminum Arms and Base Executive Chair, White Mid back white eco leather 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