Integra ESD Chair effectively meets the needs of various work environments. Pneumatic, non-tilt adjustment design allows you to alter both seat height and back depth. Height settings from 21.5" to 31.5" ensure people of most heights can work comfortably. Contours and waterfall seat improve lower-body circulation and encourage proper spine alignment. Fabric upholstery meets CAL 117 and NFPA 260A/UFAC Class 1 standards. Threaded adjustment knob moves 20" chrome footring in height along the base cylinder. Sturdy, five-legged aluminum base moves on ESD mushroom FFABs and comes complete with conductive components and a brass drag chain. ESD chair meets ANSI/ESD STM12.1 standards. Fabric upholstery meets CAL 117 and NFPA 260A/UFAC Class 1 standards. Office chair supports up to 300 lb.