Replacement parts for Osprey Madison #6 and #5.5Ultra-flex (UF) and Zebra G  Fountain pens are available just as a Nib Unit or as a complete Assembly.

The #6 UF and #5.5 UF series is available in Extra-Extra-Fine (EEF), Extra-Fine(EF), Fine(F), Medium(M) and Broad (B) in Steel. You can also choose a  replacement part for a Zebra G fountain pen in this listing. 

The Ultra-flex and Zebra G  series work best in conjunction with an Osprey Converter. Use only with fountain pen inks. Do not use India Ink as this can gummy up the feed. (Check out India Ink fountain Pen listing, if you are interested in a pen that works with India Ink). 

If using with a Madison Nimbus or Madison Midnight blue model of Osprey Pen, make sure you add the  Madison2 Outer Section to fit these regular nib units.You can read more about Madison2 Section here

You have the following choices:

1) Purchase just the Nib Unit (if you already have the Madison2 Outer section). 

2) If you don't have the Madison2 section, add the Nib Unit + Outer Section combination. The Outer section costs $1.50 more. Choose 'none' if you don't need the Outer Section.

3) If you want a complete assembly (nib unit + Outer Section + Converter), you can add an Osprey Converter  to the above 2 selections. The Osprey Converter costs $3.00 additionally. Having extra-assemblies to use with your pen makes using different inks easier, without having to wash out the ink every time you wish to switch inks. You simply need to plug this assembly into your pen and you are ready to work with it. If you don't need an assembly, choose 'none' from the drop down values.

Click here to access the Flexpert Maintenance Guide.