Alvin Drafting Chair Comfort Black Drafting should be done when you're comfortable and at just the right height to make the tabletop convenient. With this drafting chair, you can adjust the height from 24.5" to 29.5" with the pneumatic height control. The backrest is also adjustable for both the height and the depth. The seat cushion is a full 2" thick for a soft place to support you as you work. Choose the optional armrests for even more comfort. The polypropylene seat and back shells make this chair durable and give it modern styling. The seat cushion measures 18"w x 17"d, and he backrest measures 14"w x 12"h. The dual-wheel casters and 24" diameter reinforced nylon base give it stability and make it easy to move it across the room when needed. Use this chair in the home, office or shop to make every minute spent drafting a comfortable one.