Height adjustable: This gas lift office chair is built with a gaslift cylinder to ensure your safety at every height. You can use the control bar beneath the seat to easily lift it up to 103cm/40.6inch or push it down to 88.5cm/35inch. Smooth 360° swivel: The 360-degree rotation seat provides extra convenience when you move from one task to another. This revolving computer chair stands on 5 noise-cancelling casters, all made of high-quality plastic and rubber and capable of multidirectional running.