Fits Outside Tile Dimensions: 11.5" x 16.5" to 13.25" x 18.25". Made in the USA. Chimney caps help prevent costly repairs and keep your family safe from harm. Chimney caps protect your chimney from moisture such as snow, ice and rain and debris from close by trees. Chimney caps protect your home from wildlife such as birds and other nesting animals. Chimney caps act as a spark arrestor to prevent most ascending sparks from reaching the outside. Seven-Year Limited Warranty. 24 Gauge Single Piece Galvanized Steel Hood with Scalloped Corners and Drip Edge. 14 Gauge Galvanized Steel Base for Extra Strength. 18 Gauge 3/4" Expanded Galvanized Steel. Attractive Black Powder Coated Paint Finish. Slotted Hex-Head Bolts. Expanded Metal Mesh Turned Inward at Base to Allow Cover to Rest Firmly on Tile Closing Any Openings Around Tile. Outside Mounting Provides Greater Free Air-Space for Better Draft. If you dont have a flue tile to attach to, the bolt-on style is easily converted to a slip-in with a leg kit CBOLK (not included). Not for use in situations where Oil or Coal is burned, or when Wood/Pellets are used as primary source of heat"