Product literature in response to phone inquiry - cover letter

It was a pleasure speaking with you today. As promised,
enclosed is literature on the [products]. We will be happy
to get together with you, upon your request, to explain the
functions of each system in order to assist you in your
decision making process.

Thank you for the courtesies you extended during our
telephone conversation. We hope that we can assist you
with your requirements.

Very truly yours,