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The package include the good ,COA,packing list and so on. You can query the original test report through the P.O. number and the Lot number in the COA.

Your questions regarding the quality of our products will be responded within 24 hours by our professionals (Email:

In the unlikely event of a product with quality issue, we accept unconditional return. For returns of the customer's own reasons, a 25% of the P.O. value will be charged.
For the customized synthetic products, we will notify our customers each step and each key node of the production by email.