Lexington Series ESD Chair delivers a perfect combination of comfort, style and ergonomic benefits. Pneumatic adjust offers height settings from 24" to 34". Waterfall seat design improves lower-body circulation and overall health. Fully contoured back encourages proper spine alignment. Along the office chair's base cylinder, a threaded knob adjusts the footring's height from 6.5" to 16.5". Fabric upholstery meets CAL 117 standards and features an edge-protective bumper guard. ESD fabric has static-dissipative properties ensuring appropriate static dissipation. Sturdy, five-legged nylon base moves on hard floor casters, supports up to 300 lb. and comes complete with brass drag chain. Seat size is 18" wide x 18" deep. Back measures 16" wide x 15" high.