Choose between stainless steel or galvanized steel painted black when using this HomeSaver Pro Cap to cover round clay flue tiles. Note: These caps are not for use on metal prefabricated chimneys. Support tabs inside the base sit on the flue tile and the cap is then secured with screws through strip-proof weld nuts. The stainless steel model comes with a lifetime warranty. The galvanized cap carries a lifetime warranty on workmanship and materials and three-year against rust-through.