#### Chief TomaToe

##### Member

If you look at the bottom of feeds for certain fountain pen kits, you will find a single digit number embedded in the thermo plastic. In my instance, I have found the numbers 4, 5, and 6 on the Atrax and RAW Brass fountain pen kits. These kits do not tell you what nib width you are getting (such as EF, F, M, B), so I have no earthly idea what they mean!

Does anyone have a clue as to what these mysterious numbers on the feeds mean? Unfortunately, I don't have a picture at the moment, but I will take one if folks would like to see some examples.