The Black Galvanized Steel Draft King chimney cover is the durable and economic choice for chimneys in most regions. Like all Draft King chimney covers, the outside mounting design provides maximum free air space and better draft while the attractive powder-coat finish helps it stand up to the elements. Made with a 24-gauge galvanized steel hood with scalloped corners and roll-formed edges, 18-gauge 5/8" expanded galvanized steel mesh, and 14-gauge galvanized steel base. Using slotted hex-head stainless steel mounting bolts, Draft King's unique corner chimney cover mounting attachment provides the most secure fit possible to a masonry flue tile.