The heating elements is completely cast in the center of a thick aluminum ring allowing the heater to operate at a cooler temperature, lengthening life span. Sinking De-Icer is thermostatically controlled with an automatic shut-off and will attach to the 88RG Guard (sold separately) for use in a plastic tank. 3 Year Warranty. 1500 Watts. Wt. 3.3 lbs.