The static control tubular lab chair is ergonomically designed with comfort shaped seat and backrest with lumbar support. Chrome plated metal parts, metal-to-metal contact points and drag chain. Upholstery is ESD black vinyl. Seat measures 18.5""W x 16.5""D x 3"" thick with internal seat board bumper guard. Seat height adjusts easily with pneumatic control. Backrest measures 14.5""W x 9.5""H with tilt and height adjustment. Features a 23"" diameter five-legged chrome tubular steel base with conductive casters and a 20"" diameter attached foot ring. Warranty: 13 years.