DEWENWILS 3ft Heat Cable helps you to get through the freeze without frozen pipes. It was designed to meet your requirements for heating pipes. Equipped with a built-in thermostat, it doesn't stay on all the time if not needed. It comes on working below 37°F and turns off above 50°F. It allows you to see if the heating cable is working from a distance, so you do not have to go out and check it. The heating cable is suitable for all kinds of plastic and metal pipes.PVC as out jacket, ETL & CSA certified.