Full ergonomic adjustability, durability and easy clean ability make this chair an ideal choice for laboratory, healthcare and other work environments. Functions include Pneumatic Seat height adjustment range of 16” to 21”, fixed rearward Seat tilt of 3.5 Degrees, backrest tilt and height adjustments. Features 16.5” wide x 12.5” high self-skinned urethane backrest with ventilating ribs and lumbar support, 18.5” wide x 17” deep x 1.5” thick self-skinned urethane Seat with ventilating ribs, a high-profile euro-style 25.6” diameter cast aluminum base with T-shaped construction for added strength and dual-wheel, non-marring polyurethane casters that resist movement when the chair is unoccupied; chrome finish on metal parts. Complies with product safety and performance standards guidelines as established by the American National standards Institute (ANSI) and business and institutional furniture manufacturers’ Association (BIFMA). LEED compliant. Backed by a 13-year warranty with lifetime warranty on pneumatics.