The deluxe tubular lab chair is ergonomically designed with a contoured shaped seat and ergonomic backrest with lumbar curve. Upholstery is black vinyl. Seat measures 18.5""W x 17""D x 3"" thick with waterfall front. Seat height adjusts easily with pneumatic control. Backrest measures 14.5""W x 15.5""H with tilt and height adjustment. Features a 23"" diameter five-legged black painted tubular steel base with casters and a 20"" diameter attached foot ring. Warranty: 13 years.