Bio fit 24 hour antimicrobial stool – 15-20″ seat ht. – black these anti-microbial stools are ideal for multi-purpose seating in heavy duty applications. Great for schools, laboratories, clinical labs, colleges, hospitals and more!! polypropylene seat and back feature uv inhibitor and anti-microbial properties to prevent mold and bacteria growth. Seat has a waterfall edge front to provide an ergonomic chair that is durable enough for 24/7 seating. Ergonomic adjustments include pneumatic seat height adjustment, back height adjustment, and independently locking seat and back angle adjustment. Back measures 16″w x 10-3/4″h. Seat measures 17-1/2″w x 15-1/2″d. Tubular 5-blade base includes fixed height 360 degree foot ring and 2″ diameter plastic base glides.