Upholstered in soft and durable Smooth Black Microfiber PU Leather Built in lumbar support to maintain proper sitting posture Flexible adjustment for seat height and tilt tension control Heavy duty chromed steel base with durable multi-surface dual wheel casters Chromed armrest with sofa pad for arm positioning Convenient pneumatic seat height adjustment Tilt Tension Function enables to control the smoothness of the backrest Tilt/Recline Excellent for office, work station and cubical area 360 degree swivel wheel and chair can run smoothly on floor Comfortable, Attractive, Supportive