F, M, B, WTF? - Herói de Papel

What are those little letters printed on the nibs of your fountain pen? How do you choose the ideal nib thickness for you? These and other questions you've always wanted to ask but didn't have anyone to ask! Help me make a better Paper Hero by becoming a patron on Patreon:   / heroidepapel   Roboskater by Audionautix is ​​licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...) Artist: http://audionautix.com/ Say hi to Marcelo on Twitter:   / marcellvs   on Facebook:   / marceloduarteferrari   or on Instagram:   / marceloduarteferrari   Did you know you can find fountain pens on Amazon? Check it out: http://amzn.to/1JB0AMs