This chair by Office Star® features a pneumatic height adjustment, built-in lumbar support and locking tilt control with adjustable tilt tension. Ideal for bedrooms and home offices. Faux Leather Seat and Back with Built-in Lumber Support One Touch Pneumatic Seat Height Adjustment Locking Tilt Control with Adjustable Tilt Tension Padded Nylon Arms with Polished Aluminum Accents Heavy Duty Nylon Base with Polished Aluminum Accents and Dual Wheel Carpet Casters Assembled Dimensions 26"W x 31"D x 46"H Easy to assemble Work Smart™ 22.00-in x 23.00-in Black Faux Leather Chair