All the auxiliary materials are made in in standard factories and are 100% inspected by Sunrise  to ensure the product stability during processing. Auxiliary materials are often used in the process of production of the radiator, and for key parts such as welding wire, pipe stopper, nozzle, etc. If these are made in nonstandard plants, it is easy to cause product inconsistency and quality instability, thus the product quality problems outstand.

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