Farm Innovators Premium Cast Aluminum Submergible De-Icer This High quality de-icer is constructed of patented cast aluminum for durability, efficiency, and safety. Thermostatically controlled to operate automatically. The Thermo-Dynamics of cast aluminum enhances the heat output making this the most efficient de-icer on the market! Heavy-duty, anti-chew cord protector. 1500-watt Submergible De-Icer Safe in any Plastic, Rubber, or Metal tanks up to 15 gallons UL Listed Model H-419