These mesh drafting chairs feature: Built in lumbar support, one touch pneumatic seat height adjustment360-degree swivelHeight adjustable chrome foot ringDurable nylon five star base with dual wheel castersHeight adjustable arms available for a minimal charge
Dimensions: Seat Size: 20"W x 19.75"D x 3.5"Thick. Back Size: 19.75"W x 17.75"H x 1"Thick. Seat adjusts from 27.5" to 32.5"H. Limited lifetime warranty from Office Star. These mesh drafting chairs normally ship within 2-3 business days from our CA warehouse.