Versatile task chair features pneumatic seat-height adjustment, back-height adjustment, 360-degree swivel and multitask control. Includes a five-leg base and 2" hooded dual-wheel casters. Base arms are 16 gauge formed steel with plastic base cap. Seat offers 5/8" thick five-ply plywood, 3-1/2" thick molded urethane foam and foam cushion. Back is compound-curved shape, blow-molded plastic and 1-1/2" urethane foam cushion for added comfort.