This drafting chair is distinguishable mainly by its extra height. It comes complete with armrests, pneumatic height adjustment from 24" to 28", and a 24" diameter reinforced nylon base with hooded casters, and a 21" black foot ring. The extra-thick molded foam seat cushion is 18"w x 18"d x 3" thick. The vented mesh backrest is 18" wide, rises 18" above the seat, and is depth adjustable. A padded lumbar support can be adjusted up and down for comfort. This model is a drafting height chair and has no tilt or rock function. 45 lbs. Black.