Farm Innovators Model C-500 Submergible Cast Aluminum "Around The Farm" Utility De-Icer, 500-Watt Designed for multiple uses around the farm Constructed of patented cast aluminum for ultimate efficiency and safety Thermostatically controlled to operate only when necessary Safe in plastic and in containers up to 50 gallons Made in the USA Multi-use submergible de-icer Thermostatically controlled to operate only when necessary For use in containers up to 25 gallons, including plastic containers 500 Watts