One of the really cool things about the Monteverde Invincias, Napa, and Regatta is that they all use the same size nib that you can swap pretty easily. This allows you to buy their pens with nib colors (black or steel) that wouldn't normally be offered, as well as buy extra nibs to keep on hand to swap out on a single pen. Swapping the nibs are pretty straightforward, but can be tricky if you aren't familiar with the nibs and how they fit in the pen. This video is to clear up any confusion you have about swapping your Monteverde nibs.