This product is made of high quality stainless steel, equipped with constant temperature control device. Surface treatment has two kinds of spray and planing, with beautiful appearance, corrosion resistance, long life and so on. This product is suitable for cummins, Perkins, Caterpillar, Volvo, Shangchai 135, Weichai Steil and other engines, as well as similar water-cooled diesel engines, engine sets and engineering locomotives, for preheating and anti-freezing.