Atoll barstools feature 2” of high resilient upholstery foam and a 1-1/4" round metal tube and our premium nylon guides. Joints are hand-tailored, coped, and brazed. 360° flat swivel seat. Technical Bulletin CAL 117 fire retardant upholstery materials are standard. All metal chairs have an oven-baked epoxy/polyester finish. See our Metal Finish Selector for finish options.