This listing is for Size 5.5 Ultra-flex 2-tone Nib units and Assemblies.

If you have already purchased an Osprey Milano, Scholar or Madison fountain pen, you can now buy replacement assemblies or just a nib unit

The assemblies cost $22, while the replacement nib units are priced at $18. The additional parts that come with the assembly are the generic outer section and the osprey converter, that you don't get with just buying the nib unit.

If you are buying an assembly for the Madison series, it comes with a generic Clear outer section, and if you are buying for a Scholar or a Milano, it comes with a generic Black outer section.

Note that the #5.5 ultra-flex nib units come with custom ebonite feeds to keep up with ink demands of flex writing. These units do not accept International converters or cartridges and work best with the wide-mouthed osprey converters, designed specifically for use with ultra-flex nib units.

Do not use India Inks, they can clog the ebonite feeds. Fountain Pen inks are recommended. Few examples of inks that work best with the Zebra G or Stainless steel  ultra-flex or the Titanium ultra-flex are :  The Noodlers standard Black , Platinum carbon Black, D’Artremis document Black ink, Pilot Iroshizuku line of inks, Rohrer & Klingner SketchINK. 

Send us an email to info@ospreypens.com if you have any questions.