Atoll barstools feature 2” of high resilient upholstery foam, a 1-1/4" metal tube and our premium nylon guides. Joints are hand-tailored, coped, and brazed. 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.