Description 1 Review This TWSBI stainless steel Medium replacement nib was designed for the TWSBI Vac Mini fountain pen, so that you can change different nibs to suit your mood. Just unscrew the section, push out the old nib unit and insert the new one. The TWSBI Vac Mini fountain pens are available in Smoke or Clear options. We offer Free Shipping on all orders over $59 for US customers! 1 Review Hide Reviews Show Reviews 4 Works well Posted by Robert Grizzard on Oct 11th 2025 I had my Vac Mini filled with Doamine's Registrars ink when the O ring seals on the nib started leaking. I was wanting to put a nib other than the stub in the pen anyway, so I put this in it. No more leaks, and a glassy smooth glide across the paper. If you need one, get it. But no Registrar's ink.
4 Works well Posted by Robert Grizzard on Oct 11th 2025 I had my Vac Mini filled with Doamine's Registrars ink when the O ring seals on the nib started leaking. I was wanting to put a nib other than the stub in the pen anyway, so I put this in it. No more leaks, and a glassy smooth glide across the paper. If you need one, get it. But no Registrar's ink.
