This industrial drafting stool from OFM features an anti-microbial plastic seat pan with your choice of black or silver finish steel tube frame. Other features include 360 degree swivel, pneumatic seat height adjustment, adjustable height foot ring and a heavy duty nylon base with dual wheel standard casters. Meets or exceeds ANSI/BIFMA standards. Dimensions: Seat Size: 18"W x 19"D. Back Size: 18.5"W x 8.5"H. Seat adjusts from 21" to 24.5"H or 25" to 28.5"H. Limited lifetime warranty from OFM. This chair normally ships within 1-2 business days from our NC warehouse.