Reporting question for Tube Shield - For 9-Pin, Aluminum, Extra Long

Product:
Tube Shield - For 9-Pin, Aluminum, Extra Long

Question:
I have the citation 1 harman kardon preamp. Wondering if these would work for shields for the 12ak7

Answer:
We are unfamiliar with a 12AK7 tube. It is possible that the tube is actually a 12AX7, and if that is the case, this tube shield is longer than we would recommend. The P-SS9-325 is what we would suggest for standard sized preamp tubes.