This practical medium back operator chair has a gas seat height adjustment and hinged tilt backrest. It has a swivel seat and backrest with hinged tilt.. Generous seat size . Gas lift seat height adjustment. . Durable 5 star base with twin wheel castors . Requires easy self assembly . Seat height (mm) 470-590 . Seat height (mm) 460 . Seat Width (mm) 460 . Back Height (mm) 330 . Back Width (mm) 400 . Overall Width (mm) 460 Please note this product is delivered direct from our supplier and may take a little longer to arrive.