Duke Fude Nib Fountain Pen Medium to Broad Nature Mother Pearl on Cap with Pen Pouch sketching Art Drawing Signature Calligraphy Pen Case Set

I tried it with a few different inks and they all work flawlessly in this pen. It writes smoothly (although I mainly use it for drawing). The Fude nib is like a Japanese Fine width (maybe .3mm??) at its thinnest and goes to maybe .7mm thickness. Turning it upside down gives you an even thinner line at maybe .25mm?? (these numbers are just my eyeball estimates; hence the question marks).

Some of the pens in this posting have pen bodies that are straight and some have bodies that have curves. I think the ones with jewels in their name are the straight-bodied pens - the Ruby, the Sapphire, etc., while the curved bodied pens are called calligraphic (I think the manufacturer calls the curved-bodied pens the Duke 600, and I don't know why this seller isn't using the manufacturer's name for their product because it makes this pen harder to find.) Both pen bodies post, but post differently. The one with the curves posts the most securely, and fit my hands the best with great balance. The grip on these pens is also different. The pens with straight bodies have a feed and a nib, the ones with curved bodies have a feed, nib, and super feed that delivers more ink more reliably in each stroke. I have purchased 4 pens with curved bodies, and one of them had a removeable feed, nib, and super feed to make cleaning easier, while the other three curved-body pens did not. I purchased one pen with a straight body (I think the Ruby) and returned it - it didn't work as well for me, and I hadn't realized before purchasing it that it would write differently because it didn't have the super feed. I love the ones with curved bodies/?Duke 600? - they are GREAT for doing pen and ink drawings. The angle of the fude nib is excellent and comfortable along with the great ergonomics of the curved pen body and textured grip. If you are looking for a writing pen - you might prefer the straight bodied pen without the super feed because it will probably be a 'drier' writer less prone to smearing. Whatever you are looking for - be aware that this posting contains two very different pens, and choose accordingly. Please see my attached photos highlighting some of the differences in these two pens.

Overall a great pen, but I am not sure I should have gone with the fude nib.Details:The body of this pen and the build quality are surprisingly excellent. This pen has a nice heft and neither looks nor feels like an inexpensive pen. The metal work in particular is surprisingly nice with a lot of little details that make this feel like something upscale.Filling the pen via the included converter was a typical process. This revealed the only slight thing I'll ding the pen for, which is that the converter "snaps" in rather than screws in. That's not quite as satisfying as it could be and I am not left with the utmost in confidence that it won't pop out at some point.The pen is comfortable in the hand and everything is just about perfect.I bought this pen so that I could try out a fude nib. I've been practicing kanji and I thought it would be cool for that. But after several weeks I've found that I much prefer writing kanji with my other pens, and for line variation I prefer using a brush pen. (I have not yet had a chance to try a flix fountain pen nib.)The fude nib is interesting and you can do a lot with it -- everything from very fine lines to very thick lines -- but I'm sorry to say, it's a bit of a pain. Getting the line variation requires a change in hand angle and means that you have be very careful and very deliberate. Many letters that I might write with a single fluid stroke of a brush pen require two or even three strokes with the fude nib as I need to change angle at various points.In addition to the above, the writing experience is either soaking wet (when doing thick lines), or a bit on the dry and scratchy side (when doing fine lines). There might be a tiny bit of sweet spot in the middle, but it's tough to find. And when writing "normal" stuff in that sweet spot, you need to be very careful to maintain hand angle lest you slip into the thick zone and your letters become illegible ink blots.That's a lot about the nib, but it's information I wish I'd had upfront. This is a fun toy for me at this point but not something I'll really reach for.Overall, high quality and excellent value. The nib is what it is. I definitely recommend this model of pen and I look forward to a lot of writing with it once I change out the nib.