Noodler's Ahab Flex Fountain Pen - Cardinal Darkness

Product Code N15029
In Stock, Usually Ships in 1 to 2 Business Days
The Ahab flex pen was introduced in late 2011 and is currently Noodler's most popular fountain pen. It features a steel flexible #6 nib and a slide piston mechanism. This color pen may have varying degrees of black and red in the swirly design.
Notify me when this product is back in stock.

Noodler's Ahab Flex Fountain Pen - Cardinal Darkness

The Ahab flex pen was introduced in late 2011 and is currently Noodler's most popular fountain pen. It features a steel flexible #6 nib and a slide piston mechanism. If you'd like, you can even remove the piston mechanism and use the pen as an eyedropper for a massive 6ml ink capacity. The Ahab is made of a celluloid derivative and is technically biodegradable and formed from a "renewable resource". The vegetal resin body of this pen may show particles or striations within the material. This is most noticeable in demonstrators and bright colors.

The Noodler's flex pens were designed for the hands-on tinkerer - they are made to be taken apart and adjusted. The nib and feed pull right out and can be adjusted and heat set for optimal performance. Don't be afraid to get a little ink on your fingers while you learn how to use this pen.

As a simple rule of thumb for writing with a flex pen, just apply slight pressure on your downstrokes, which will spread the tines and increase the line width, achieving that optimal line variation. Make sure to go slowly so that the ink can keep up with your writing. As with any flex pen, it just takes practice!

Due to the residual machining oils used when cutting the feeds for these pens, we highly encourage you to give the pen a good flush before use. We recommend any of the following options: distilled water, water with a touch of dish soap, a pre-packaged pen flush, or a solution of 10% clear ammonia to water. This should resolve most ink flow issues!

Usually Ships in 1 to 2 Business Days
Fountain Pens
Pen Model
Noodler's Ahab
Body Color
Body Material
Cap Type
Compatible inks & refills
Bottled inks
Filling Mechanism
Eyedropper, Piston
Grip Material
Nib Color
Nib Material
Nib Size
Diameter - Body
14mm (0.6in)
Diameter - Cap (without clip)
15mm (0.6in)
Diameter - Cap (with clip)
20mm (0.8in)
Diameter - Grip
9.9mm (0.4in)
Length - Body
128mm (5in)
Length - Cap
60mm (2.4in)
Length - Nib
20mm (0.8in)
Length - Overall (Closed)
139mm (5.5in)
Length - Overall (Posted)
170mm (6.7in)
Weight - Body
12g (0.4oz)
Weight - Cap
6g (0.2oz)
Weight - Overall
18g (0.6oz)
Max Ink Capacity - Eyedropper
Max Ink Capacity - Piston/Vac
Noodler's Ahab Flex Fountain Pen - Cardinal Darkness is rated 3.8571 out of 5 by 7.
Rated 4 out of 5 by from So much pen for the money I love this company. Great products at unthinkably cheap prices. This pen is a joy to use. The line thickness it puts down is extremely variable depending on the pressure. Basically it can do extra fine to triple broad. Getting consistent results takes practice though. The construction is so simple and easy to clean. I do clip my pens to my pant pockets and I live an active life and the pen has showed this. The clip works just fine but has been slightly bent and the body marks. These are easily fixable but keep this in mind if you don't carry your pens in cases or cases with loose pens. I highly recommend this pen. People will notice when you pull this pen out.
Date published: 2016-03-13
Rated 5 out of 5 by from Work horse This is my daily work pen and I have had it for 7 months now. As the old saying goes I never leave home with out it. I fill it up and don't have to refill it for at least a week sometimes 2 weeks. I keep this filled up with Noodler's X-feather and have never once had any flow issues. The nib give me a touch of feed back not enough for me to think that I have to smooth it out, like I have with many of my nibs.
Date published: 2015-06-23
Rated 5 out of 5 by from Simply Beautiful I purchased this pen because I do have another. Sounds ridiculous but here is my reasoning. I do a lot of genealogy work. And I want my notes to reflect the pages of documents I sift through. Many of these documents were written with dip flex pens or Calligraphy pens. So I wanted one to write like the pages I see. You know... put me in the mind set. I know... weird. So here is the kicker. I also wanted a red ink for a second pen for notations on copies of old documents that stand out. Sheaffer Skrip red was recommended. But I didn't like how it wrote with the flex. So I got this pen and bought a standard Noodler's nib and problem solved. I have my geanealogical pen set up. And I will tell you. It writes like a dream. Feels like a dream. And IGNORE those saying it smells bad. Not even noticeable. Very nice pen not to mention VERY affordable.
Date published: 2016-05-21
Rated 4 out of 5 by from Great features for the price First off, 'Cardinal Darkness' is an awesome name for a color, or a metal band. The Ahab is an exceptional value for a flex nib pen, while keeping in mind that you are getting what you pay for. The nib is responsive and gives substantial variation in line weight. For drawing, I find it easier to control than my Namiki Falcon. In spite of a few quality issues (again, it's only 20 bucks), this pen performs remarkably well. Pros: *Line variation *Huge ink reservoir *Value *Not related to the pen itself, but the packaging is charming. Cons: *Out of the box, the 'celluloid derivative' used to make the body of the pen smells like maple syrup farted. It's still noticeable, but not as pungent, after two weeks. *Occasional leakage around the grip. *It's hard to tell from the photo, but the Ahab is chunkier than I expected. This isn't a serious drawback, but it is a little unwieldy in the hand.
Date published: 2015-06-18
Rated 1 out of 5 by from The worst! This pen has all three sins of a bad pen: it skips, scratches and leaks. An unusable prodect.
Date published: 2016-06-24
Rated 4 out of 5 by from Awesome Intermediate Pen I was worried about buying this pen because of the mixed reviews. Sure, it can be a little finicky, but it is mostly a really good writer. And I followed two YouTube videos (one by Brian Goulet) to heat set my pen, and I think that helped it become a little more reliable. Because of this, it's not a pen for a beginner. I recommend starting with a Pilot Metropolitan. But after you've got the hang of how amazing a fountain pen can be, give this one a try. It's worth it! And yes, as the reviews warned me, this pen smelled really bad when I opened it, but that smell has all but gone away. The flex nib is really fun, a little stiff, sure, but it's really fun. I was shocked by how much I liked my handwriting when I wrote with it. The colors are amazing. This really us a beautiful pen. It exceeded my expectations there. The plunger fill mechanism is great. It takes four or five pumps to fill it all the way to the top, but once it's there, man does this thing hold a lot of ink! The pen feels really sturdy. The only part that doesn't feel quite as durable as I had hoped is the clip. It's thin and doesn't have as much spring in it as my Pilot and Lamy pens. Anyway, this is truly a great pen. My complaints with it are minor ones. I absolutely recommend it.
Date published: 2016-07-11
Rated 4 out of 5 by from A lot of fun for the money. I've only been using fountain pens for the past few months and this is the first flex nib pen I've gotten. That being said, I'm having a lot of fun with it. With just a touch of pressure you can get a bit of line variation that will add character to your writing. Add some more, and you can really dress up your notes, to-do lists, etc. by easily creating BOLD characters for headings and emphasis. I've also been using it for some sketching work and it works well to go from very fine to gushing wide lines. I took the advice of many folks who have reviewed the Ahab before and gave it a thorough flushing with a couple drops of dishsoap in lukewarm water before inking up and have not had a single issue with ink flow. Thus far, I've only inked it with Lamy Black, but I'm looking forward to seeing how other inks will look. I like the way the pen feels in the hand- I have fairly large hands, so it sits comfortably, although the grooves for the cap are right where I like to hold the pen so I end up adjusting my grip a bit more than I'd like. Finish and appearance-wise it looks pretty good, especially compared to the throw-away garbage ballpoints that most people use, but it is clearly a pen that is designed to get into the hands of anyone who wants one, and it achieves that objective.
Date published: 2016-06-23
  • 2016-11-21T08:09CST
  • bvseo_cps, prod_bvrr, vn_cps_3.4.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_7
  • loc_en_US, sid_N15029, PRD, sort_relevancy
  • clientName_gouletpens