HIGH FREQUENCY WELDING TUBEWe can supply high frequency welding tube. It can used for auto radiator.Material: ALLOY 4343/3003/7072; 4343/3003; 4343/3003/4343; 4045/3003; 4045/3003/7072; 3003;Size: As per customer requirement.If you have anyquestions, please feel free to contact me.It's a new material in heat exchanger industial. I hope we could make some business with 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