I chalk it up to me not doing my research, but I wanted to swap out a Conklin Jowo Omniflex nib. That unit does not match the diameter of this unit, but that doesn't detract from the fact that it was a #6 size nib that I could swap out.
I saw someone post about OspreyPens and their excellent nibs on the Fountain Pen Network. So, that's what brought me here. I bet on this, and it turned out great.
The nib itself writes quite smooth for a Fine, and it writes on the smaller end with my Conklin Endura. (which had flow issues with the Omniflex) This nib can actually get more line variation and use out of it than the Omniflex, and that's saying something with it not advertising it. (don't push it, or you'll ruin the tines, I'm sure)
The lack of embellishment of design on the nib could be a double edged sword, but the brand name and nib size is easily visible. Maybe a future design with the brand logo is in the works...?
Get this if you're trying to switch out a #6 size nib for sure. I can't speak on the Jowo unit compatibility because my pen is a Conklin pen, after all. However, I *WILL* be back to shop more! Thanks again!