4500W, 240V, Water Heater Screw In Element, High W Density, 150+ Watts Per SQIN, Minimum Tank Diameter 15", Gasket Included, Fits Most Models Of 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 Listed, Detailed Instructions Included, 1 Year Warranty.