You can use multiple sheets to use on any size tube, easy to cut with a knife or scissorsIf you are referring to the circuit board sold by Exotic Blanks, the "roll your own", then you're out of luck. That is made to just fit the Sierra tubes with no overlap. They do sell ready made circuit board blanks for the 10mm Cigar pens. You might be able to fit one on to a Classic Elite fountain pen as they use the 10mm tubes as well. Look into it and see if it will work.