This listing is for the Jowo-compatible  Size 6 Ultra-flex 2-Tone (UF 2T) stainless steel Nib units with custom ebonite feed.

Available tip sizes: EEF, EF, F, Med and Broad.

This nib unit can be used with bottled ink using a converter such as the Osprey converter or K5 Schmidt converter, OR use with a  pre-filled ink cartridge. This flexibility gives many folks the advantage of writing with an ultra-flex nib using either a cartridge or a converter.  

Typically, most suppliers in the market place sell Ultra-flex nib units with a plastic feed. We are one of the handful of folks that give an ebonite feed  with an ultra-flex nib. An ebonite feed works with a wider range of inks and is able to keep up with the ink demands of a flex nib, unlike a plastic feed.

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  Osprey Flex nibs:  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.

Size 6 Ultraflex nibs are also available in Steel: