Milagon's Brio Series chair is the "work horse" of the industrial seating line. Brio brings innovation and performance together with one purpose in mind: Optimal seating in the workplace. Soft, comfortable polyurethane foam seat pan and backrest are featured for maximum wear and durability. These are mounted to a cast aluminum mechanism providing a -4 degree to +10 degree tilt of the seat and a 10 degree + or - angle of the backrest with spring-tensioned clutch mechanism. This self-skinning polyurethane is an ideal material for those multi-shift environments where hygiene is a concern. Self skinning polyurethane seating is chemical resistant and tough enough to withstand harsh industrial environments. Straight or S-shaped backrest bar. Seat insert is top grade, 7-ply plywood cushion finished with an injected molded polyurethane. Shock absorbing sealed pneumatic gas cylinder is unsurpassed in providing state of the art excellence in seat height adjustment. The molded polyurethane backrest and seat surface promotes air circulating breathe-ability for maximum comfort. Dynamic seating is achieved through independent adjustment of seat tilt, backrest tilt, seat height adjustment, and backrest height. Durable cast aluminum base resists fractures and damage that can happen with plastic and/or steel tube bases. Industrial strength modular construction. Ergonomically designed. Separate seat tilt and backrest adjustments. Cushioned work seat assembly. Cast aluminum star base with self-braking casters. Size: 17"-24" adjustment height; lifetime warranty.