These round black galvanized steel chimney caps are constructed of 100% galvanized steel with an extended mesh to guarantee a long and lengthy life! Will protect your chimney against birds and animals, rain and snow, debris, down drafts, and ascending sparks. An attractive powder coat finish helps to stand up to the components. These chimney cap is easily mounts with a simple screwdriver to the top of a masonry fireplace. To top it all off, they come with a lifetime warranty!