1500w, 240v, water screw in heater element, high watt density, 150+ watts per sqin, fits most models of American, a.o. Smith, Bradford white, craft master, general electric, gs wood, Kenmore, lochinvar, Maytag, mor-flo, reliance, rheem, Richmond, ruud, sears, state, & whirlpool heaters, gasket included, detailed instructions included, minimum tank diameter 9″, ul listed, 1 year warranty. Element is 6.25 inches high.