This Retro Task Chair is upholstered in Black heavy duty vinyl. It sits on a stable and stylish 25” Chrome base. It has an upright locking position feature, providing comfortable back support. The pneumatic adjustable gas lift allows for easy seat height adjustment, to help you find the personalized sitting style that suits you and your work environment. The adjustable tilt tension control knob allows you to customize the tension of the tilt. The hooded double wheel casters make it easy to move and shift directions.