We know you work hard, but there''s no reason to be hard on your body while you''re on the clock. The Mesh chair makes your comfort a priority with a breathable mesh back a range of adjustable positions and gives you extra support across the lumbar section to cradle your spine. The seat is built upon a heavy-duty base with durable casters so you can get a roll on your day without a hitch in your physique.Rolling desk chairBreathable mesh seat and back on nylon frameBuilt-in lumbar support Pneumatic seat height adjustment2-to-1 synchro locking tilt controlAdjustable tilt tensionPadded flip armsDual wheel carpet castersColor: Black Materials: Mesh, nylon, metalWeight capacity: 250 lbs.Seat dimensions: W 19" x D 19.5"Seat height range: 17.75" to 21.75"Back dimensions: W 18.5" x H 21"Arm height range: 26.25" to 30.25"Overall dimensions: W 24.5" x D 24.25" x H 41.25"