This J.Burrows Halifax Ergonomic Chair is ideal for anyone who spends a lot o time sitting at their desk for work or study. Featuring a weight balanced mechanism with 4 locking positions, meaning you can find the right level of comfort just for you, it is also gas lift height adjustable as well as armrest height adjustable. Plus, you get the full ergonomic advantages of the included seat slide and the handy castors allow you to wheel the chair where you need it.