We at Central Engineering Services do exactly the same . Here is small example :
''Dear Mr. Vikas Mittal
We are thankful to you for the courtesy extended to our Mr. Narender during his visit to your office.
Metlok is a PRODUCT INNOVATIVE company with supplies to major Automobile OEMs including Bosch Germany.
By using metlok products , various assembly shops have an additional resource for sealants
We request you to please allow us to send some samples so that same can be tried out in your manufacturing shops.
With thanks and best regards
Raj K Batra