Maybe I wasn't clear on my question, I was in a hurry. My apologies. Some pen kits offer a rollerball or a fountain pen end so the pen can be used either way. I wondered if there was a list of the kits that offer the option of being either a rollerball or a fountain pen. Have you ever sold any with both options to the customer so they can decide what they want to use? It seems like it might be a nice sales option?