The Stainless Steel Shelter Pro chimney cover by HY-C Company is constructed of 100% 304 stainless steel and built to withstand the toughest conditions. Ideal for oil, coal or heavy wood burners or for any application within 25 miles of a saltwater coast. High quality construction includes a 24-Gauge stainless steel hood with scalloped corners and roll-formed edges, 18-Gauge 3/4 in. expanded stainless steel mesh and 16-Gauge stainless steel base. Using slotted hex-head bolts, the unique corner mounting attachment design of a Shelter Pro chimney cover provides the securest possible fit to a masonry flue tile. Lifetime limited warranty.