You may also like#6 TITANIUM Ultraflex Nib Units and Assemblies
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Questions: Call
650-996-7866 or send us an email at info@ospreypens.com
Questions: Call
650-996-7866 or send us an email at info@ospreypens.com
Osprey Pens Titanium Ultra-flex Nib units are available in Extra-Extra-Fine and Fine tip sizes. The nib is springy, and has more give than a stainless steel ultra-flex. When writing with it, the nib feels softer than stainless steel and is reminiscent of old vintage flex nibs.
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 $56, while the replacement nib units are priced at $52. The additional parts that come with the assembly are the generic outer grip 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 grip section, and if you are buying for a Scholar or a Milano, it comes with a generic Black grip section.
Note that the #6 ultra-flex Titanium nib units come with custom ebonite feed to keep up with ink demands of flex writing. They work with Osprey custom converters or generic International converters such as K5 Schmidt converters.
Do not use India Inks, they can clog the ebonite feeds. Fountain Pen inks are recommended. Few examples of inks that worked best with ebonite feeds as reported by our customers: The Noodlers Standard Black , MontBlanc Burgundy Red Ink, Herbin Perle Noire, Platinum carbon Black, D'Artremis document Black Ink, Pilot Iroshizuku line of inks, Rohrer & Klingner Black SketchINK.
Pls mention inks that worked best, and inks that didn't, if you leave us a review (very grateful for that!). You know and we know that a big part of getting the most out of any pen is to get the nib/feed/ink combination right, especially with the flex nibs.
Tips:
-Upon receiving a brand new nib unit, wet the nib unit in a soapy solution or at the minimum in water, before fitting and writing with the pen.
Send us an email to info@ospreypens.com if you have any questions.
Note: Osprey Titanium EEF and Fine nibs are intentionally tuned as generous, wet writers to provide a smooth, well-lubricated writing experience.
Each Osprey nib is hand-tested and tuned before it leaves our workshop to ensure the best possible writing experience.
Exceptional fountain pen nib. Highly recommended.
I wanted to have one EDC fountain pen for writing (general notes and such), sketching (vs finished drawings), and practice pointed pen calligraphy. I don’t want to carry multiple fountains for this. Since it needs to cover so many bases, I didn’t expect it to be great at any one thing. I will say that this Titanium UltraFlex EEF nib does a pretty darn good job with each.
Writing: The nib is fine which is what I want vs a juicy line. This provides that. For those who have had a Preppy as a starter, it resembles the fine nib.
Drawing/Sketching: I like cross-hatching and line work kind of sketching. The fine line fits perfectly for that. I do intend to use the Zebra G Flexpert that I also have from Osprey when I want to do finished drawings. Using this for quick sketching.
Pointed Pen Calligraphy: I’m just starting with Spencerian and Copperplate. The flex is good (when I hold it correctly and use it right). I can tell when I’m doing it right as the nib responds well and it glides through making the letters. With a line that starts so fine, variation can be dramatic. As with sketching, I do intend to use the Zebra G Flexpert when I want to do finished calligraphy or serious practice, but this is great for casual practice.
I would have been more than happy to leave the Zebra G Flexpert on all the time, but it’s not very good for general writing and I’d have to replace the nibs all the time.
Lastly, I like dealing with Osprey Pens as a company. As mentioned earlier, I started with the Zebra G Flexpert on a Scholar and then an UF Broad Nib (where they had some nice bonuses for me). With the TUFEEF, I asked for a fine nib that flexed and was going to use Platinum Carbon Black as my ink of choice (actually have been using the Osprey multi-color cartridges only so far and like the color, but will go to PCB to get that solid black). They wrote me a very nice note that if I was going to use PCB—to be careful and make sure to clean out the pen often to prevent clogging since the nib is EEF. I like that sort of thoughtfulness.
Very happy with everything.
Vraiment très bien. Je recommande
On 7/16/2025 I left a 1 star review about my new Titanium Ultraflex, which was giving me several problems. I had been having issues with the supplier from whom I'd purchased it, which was disappointing and frustrating. Osprey Pens, however, reached out to me and have been extraordinarily helpful over the last few weeks.
We've exchanged many emails, and they invested time and effort including a long video call, to help me solve the problems. We've worked out what the possible issues are and I'm now applying various fixes and adjustments they suggested. If these all work I'll be very happy with the nib and they are also sending me a second slightly different nib, as a backup.
This is the very best of customer service and I wouldn't hesitate to buy Osprey pens in future (albeit probably from a different intermediary supplier).
i have enjoyed this nib so much. my handwriting looks great and the flex is easy and effortless.
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