Dear Mr. Philip,
Thank you very much for you calling this evening (your time).
We are really appreciating all your kindly support and understanding us.
Please see our product specification and the inspection method of ours in attach.
We will try our best to make sure that this problem will not happen again. We will work hard and try our best to make our business go smoothly and grow up in near future.
If you have any question, please feel free to let me know. Thank you very much.