Dear ...
I certainly appreciate the time and attention you gave me for the interview. You were extremely thorough in explaining the requirements of the position and I thank you for taking me on a tour through the facility.
Now that I have a very good understanding of what the position entails, I am even more convinced that I would be an asset to your team. My education and experience seem to be a good match with the job requirements. I just wanted to add that my __(type of experience)__ experience provided me with an excellent opportunity to develop expertise in area of __(type of field or skill)__ and I believe this could prove to be very beneficial to your team.
Once again, thank you for your time and for the consideration you showed me during my visit. I am very enthused about the possibility of joining your team and look forward to hearing from you soon.
Sincerely,