Martin Vesuvio Drafting-Height Chair, Gray Fabric, 1 Each (91-8006113) Easy to assemble chair is equipped with pneumatic lift, fingertip controlled height and backrest adjustments, loop armrests, and a reinforced 5-star safety base Includes an 18" adjustable chrome foot ring Seat tilt and back-spring adjustment capabilities Ergonomically contoured seat (19.5" W x 17.5" D) and backrest (16.5" W x 14" H) Seat height from floor to seat: 23.75 - 34"; Armrest height range from floor: 32.5 - 41"