Don’t let discomfort affect your productivity! This drafting chair is a comfortable and lightweight chair that is highly mobile. It features contoured back and seats to help to relieve back strain. It has pneumatic gas lift seat height adjustment to raise the seat from 28 inches to 33 inches. The large 27-Inch nylon base will provide greater stability. It is equipped with hooded double wheel casters, and optional glides can be used in place of casters to stop this chair from rolling. The multi-function drafting stool comes with options of no arms, adjustable arms, or loop arms.