Dear SirFirst of all, to know what to call youI am glad to receive your letter, I can provide the specifications of the product would you like to test?Maybe you can quote from me to make a few choices
Dear sir First of all, to know how to address you I'm glad to hear from you, I hope you can provide those product specifications to test? Maybe you can make some choices from my offer
Dear sirFirst of all, to know how to call youI am very pleased to receive your letter, you hope that I can provide the specifications of those products to test?Maybe you can make some choices from my offer.