<p>The Bevco 9350M-E-BKV-CARD5S Integra- E series chairs offer around-the-clock reliability for environments that require static discharge control. Integra-E chairs meet ANSI/ESD STM12.1 - 2013 standards. Backrest styles are uniquely shaped for full back support and come standard with a heavy-duty ESD polypropylene back shell to protect the upholstery. Resilient high-density foam provides long lasting comfort.</p>The Bevco 9350M-E-BKV-CARD5S Features:<ul><li>Heavy-duty construction<li>ESD Fabric and ESD vinyl upholstery options<li>Upholstery meets CAL 117 standards<li>Easy-to-use pneumatic height adjustment<li>Waterfall seat to aid lower body circulation<li>Seat foam density: 2 ? lb., 55 IFD<li>Fully adjustable contoured back with durable scuff resistant ESD polypropylene back shell<li>360? swivel<li>Sturdy 5-legged base with conductive components and brass drag chain<li>High performance adjustable ESD 20" diameter footring on mid and tall height ranges standard<li>ESD Mushroom glides standard<li>Meets ANSI/BIFMA standards<li>Supports up to 300 lbs.<li>12-year warranty<li>Lifetime warranty on cylinder<li>Seat: 20? W x 18? D x 3? Thick<li>Medium Back: 17 ?? W x 16? H x 3? Thick<li>Large Back: 17 ?? W x 19? H x 3? Thick</ul>