Hi I didn't know where to put this so please delete if this is the wrong place, but...
I wanted to know how to pick the right feed for my pen when buying from Fountain Pen Revolution.
Here's the link in case anyone wants to see: https://fprevolution...ctions/5-5-nibs
My pen has a feed that is 39mm long but I'm not sure that's what they're measuring here. Any and all help appreciated!