This contemporary mesh drafting stool from OFM features a screen mesh backrest for the ultimate in temperature control and support. Other features include a thickly padded fabric mesh seat, 360 degree swivel, pneumatic seat height adjustment, seat pitch adjustment, back height adjustment, back pitch adjustment, articulated 3-lever synchronized seat & back adjustment, built-in lumbar support and a heavy duty nylon base with dual wheel standard casters. This drafting chair includes a steel footring with two different sized height extensions. Optional adjustable T-shape arms are available for a minimal charge. Meets or exceeds ANSI/BIFMA standards. Dimensions: Seat Size: 19"W x 17.75"D x 3"Thick. Back Size: 17"W x 18"H. Seat adjusts from 25.5" to 30"H or 28.5" to 33"H. Limited lifetime warranty from OFM. These mesh drafting chairs normally ship within 1-2 business days from our NC warehouse.