Camco 4500W 240V 13"H Universal Flange Better Water Heater Element. It features a low watt density of 75+ watts per square inch for efficient heating and a minimum tank diameter of 13" for compatibility with most American, A.O. Smith, Bradford White, Craftmaster, General Electric, GS Wood, Kenmore, Lochinvar, Maytag, Mor-Flo, Reliance, Rheem, Richmond, Ruud, Sears, State, & Whirlpool Heaters. UL/CSA listed for safety, it comes with a gasket and detailed instructions for easy installation. Backed by a 1-year warranty.