1. 304 stainless steel panel and copper pipe inside 2. PC tank is high/low temperature resistance, unbreakable, innoxiously, antifoaming 3. It is used the imported and named compressor in the world for high efficiency 4. R404a or R134a refrigerant 5. Evaporation cylinder separate refrigeration Welcome to visit our official website : http://www.orange-juicer-machine.com