This drafting stool from Safco features a screen premium screen mesh backrest. Screen mesh allows the maximum amount of airflow possible to help regulate body temperature while still providing support to the back and lumbar area. Other features of this mesh drafting stool include an ergonomically contoured, foam padded seat with stain resistant upholstery, pneumatic seat height adjustment, 360 degree swivel, tilt tension adjustment, tilt lock, chrome finish footring, built in lumbar support curve and a heavy duty nylon base with dual wheel carpet casters. Additional caster options available for this model. Optional loop arms also available for this chair. Meets or exceeds ANSI/BIFMA standards. Dimensions: Seat Size: 18"W x 17.5"D. Back Size: 17"W x 15.5"H. Seat Height Adjustment: 23" - 33"H. Overall: 49.5"H x 25"W x 25"D. Weight: 30 lbs. Limited lifetime warranty from SAFCO. This chair normally ships within 2-3 business days from warehouse locations nationwide.