VIVA OFFICE Mid-Back Mesh Chair with Adjustable Seat Height and Tilt Tension, Orange and Blue Ergonomic mid-back mesh office chair, designed to provide exceptional back support and comfort Simple pneumatic controls let you raise or lower your seat and rock back in your chair.Pulling out on the control handle, which allows your chair to tilt back, or sit forward and push the control handle in to prevent it from tilting High quality chrome base and Nylon casters Mesh seat and premium fabric upholstery to eliminate leg fatigue Orange and Blue color making your office room vivid. We provide component-exchange in two years