25.50 x 24.50 x 41.25 Inches Assembly required This mesh desk chair provides exceptional support to the hard-working professionals in your office. Transparent mesh across the back allows air to circulate, and built-in lumbar support helps prevent back strain and muscle fatigue. The swivel seat is padded with 3" of molded foam and covered with black mesh upholstery. Raise and lower the seat using the pneumatic seat height adjustment lever. Turn the tilt tension adjustment knob to increase or decrease the amount of force needed to rock or recline. Padded armrests take pressure off your shoulders and neck, and flip up 90 degrees out of the way, as needed. Dual wheel casters makes it easy to roll across the floor. Whether it's a day filled with meetings or you're working to beat a tight deadline, this stylish Mid-Back Black Mesh Swivel Task Chair with Flip-Up Arms will keep you cool and comfortable throughout your busy day.Contemporary Task Office Chair; Mid-Back Design; Back Width: 17-20"; Ventilated Mesh Back; Built-In Lumbar Support; Tilt Lock Mechanism rocks/tilts the chair and locks in an upright position; Tilt Tension Adjustment Knob adjusts the chair's backward tilt resistance; Padded Black Mesh Upholstered Seat; CA117 Fire Retardant Foam; Waterfall Seat reduces pressure on your legs; Swivel Seat; Pneumatic Seat Height Adjustment; Padded Flip-Up Arms; Heavy Duty Nylon Base; Dual Wheel Casters