Integra Chair effectively meets the needs of various work environments. Pneumatic, non-tilt adjustment allows you to alter both seat height and back depth. Ergonomic seat adjusts in height from 24" to 34". Contours and waterfall seat improve lower-body circulation and encourage proper spine alignment. Along the office chair's base cylinder, a threaded knob adjusts the 20" chrome footring's height from 7.5" to 17.5". Sturdy, mushroom-glide feet and nylon base support up to 300 lb. to ensure stability at any height setting. Fabric upholstery meets CAL 117 and NFPA 260A/UFAC Class 1 standards.