Made in the USA, HY Guard Exclusion's black galvanized steel Adjustable Chimney Cover is a durable and economic solution for chimneys in most regions. The adjustability feature of this model simplifies the difficult job of measuring and installing a chimney cover. Like all HY Guard Exclusion chimney covers, the outside mounting design provides maximum free air space, and better draft, while the durable powder coat finish helps it stand up to the elements. This HY Guard Exclusion cover is manufactured with a 24-gauge galvanized steel hood with scalloped corners and straight cut edges, an 18-gauge 3/4" expanded galvanized steel mesh, a 14-gauge galvanized steel base, and comes complete with slotted hex-head bolts. Made in the USA and backed by a 5-year limited warranty. In situations where OIL or COAL is burned, or when WOOD or PELLETS are used as the primary source of heat, do not use ALUMINUM or BLACK-PAINTED GALVANIZED STEEL chimney covers.