Integra Series 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, articulating seat and back tilt adjustment allow you to work from the most optimal position. Ergonomic seat adjusts in height from 24" to 34". Waterfall seat improves lower-body circulation and overall health. Fully contoured back provides added lumbar support and encourages proper spine alignment. Along the office chair's base cylinder, a threaded knob adjusts the 20" footring's height from 7.5" to 17.5". Sturdy, five-legged nylon base moves on mushroom glides and supports up to 300 lb. to ensure stability at any height. Seat size is 17.5" wide x 19" high. Back measures 17.5" wide x 19" high.