Alera ALEBT6516 Oversize Stack Chair with Arms, Black Anitmicrobial Vinyl Upholstery (Case of 2) Heavy-duty chair with built-in lumbar support is designed to accommodate larger guests up to 500 lbs Extra-wide seat with waterfall edge has a 3-1/2" foam cushion for all-day comfort Durable 18 gauge, 1" steel frame with front and back stretcher bars for added strength