Retro task chair features a heavy-duty, ribbed vinyl upholstery to provide an extremely durable seating option that also cleans easily. Pneumatic gas lift allows easy seat-height adjustments to help you find the personalized sitting style that suits you and your work environment. Spring-tilt mechanism allows you to change the angle of the entire seat relative to the floor, and allows you to transfer some of your upper body weight to the backrest of the chair. The 25" chrome base offers extra stability to the chair by spreading the load over a larger surface area to help prevent tipping. Hooded, double-wheel casters slide smoothly on floors to make it easy to move and shift directions. Tilt tension control allows you to increase or decrease the tilt tension to accommodate your body weight. Upright locking position provides comfortable back support. Task chair supports up to 275 lb.