I'm offering flex nib units for sale which are designed to hold the Zebra G dip nib. Over the last year or so, I've been experimenting with nib units and now nearly all of my pens will be JoWo #6 nib unit compatible.
(JoWo nibs are a pen industry standard, and JoWo the company is one of the biggest names worldwide in fountain pen nibs.)
Essentially, if you have a pen that holds #6 JoWo nibs (ask the manufacturer if you're not sure) that you want to try out my flex pens with buy a nib unit (the nib unit is the nib, the feed, and the black collar you see in the attached photo), unscrew yours from your pen and screw in mine.
Also, all of my upcoming pens will be compatible with JoWo #6 nib units so if you have a nib you like (a specially modified nib, for example), you will be able to screw out the nib unit I provide, and screw in your own.
- They are for sale on the Nib Units button at this page of DesiderataPens.com
- They can also be purchased on Etsy.com
Disclaimer: Obviously, because I can't see where the nib unit is going, I can't guarantee that it will work as well in your pen as it will work in my pens, but purchasing a separate nib unit is an option I want you to have.