Designed for the ultimate in style, comfort, and construction, the Monarch chair has contoured cushions and other ergonomic features that make it an outstanding value. High backrest provides solid orthopedic spine support and full-size upholstered seat is contoured for added comfort. Features include pneumatic height control, polypropylene seat and back shells, a height - and depth-adjustable backrest with tiltangle control, adjustable seat pitch, dual-wheel casters and a 23" diameter reinforced nylon base. Seat cushion is 19"w x 18"d x 3" thick. Backrest is 16"w x 19"h x 3" thick. Office model height adjusts from 18" to 23". Drafting model includes CK49 height extension kit and adjusts from 25½" to 30½".