Integra Chair effectively meets the needs of various work environments, especially healthcare settings. Antibacterial, anti-fungal vinyl upholstery meets ASTM G21 and AATCC TM147 standards for cleanliness and safety as well as CAL 117, FMVSS 302 and NFPA 260 standards. Pneumatic, non-tilt adjustment allows you to alter both seat height and back depth. Ergonomic seat adjusts in height from 24" to 34". Fully contoured back provides extra lumbar support and encourages proper spine alignment. Along the office chair's base cylinder, a threaded knob adjusts the footring's height from 7.5" to 17.5". Sturdy, mushroom-glide feet and nylon base support up to 300 lb. and stability at any height setting. Seat size is 20" wide x 18" high. Large back measures 17.5" wide x 19" high.