This task chair is designed for the ultimate in style, comfort and construction, the MONARCH task 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. Task chair features include pneumatic height control, polypropylene seat and back shells, a height and depth-adjustable backrest with tilt angle control, adjustable seat pitch, dual wheel casters and a 23" diameter steel reinforced nylon base. Seat cushion is 19"w x 18"d x 3" thick. Backrest is 16"w x 19"h x 3" thick. Height adjusts from 18" to 23". From Alvin.