on saleTWSBI Diamond 580AL Fountain Pen - Silver

Product Code TW-M7444240

In Stock

out of stock

on saleTWSBI Diamond 580AL Fountain Pen - Silver

Product Code TW-M7444240

In Stock

out of stock

Nib Guide

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Try our Nib Nook tool to view and compare nib widths using our writing samples. Learn more ›

TWSBI Diamond 50 Ink Bottle - Black
Add an Inkwell + $25.00 TWSBI Diamond 50 Ink Bottle - Black

TWSBI Diamond 50 Ink Bottle - Black

Product Code TW-M7442980

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The TWSBI Diamond 580AL comes with a benchmark piston ink-filling mechanism and has all detachable parts. The clear demonstrator barrel allows you to see your ink color and remaining ink level. It has a silver aluminum grip section and screw-cap. It comes with a stainless steel nib and is presented in a modern clear display case.

The idea behind the TWSBI Diamond 580 was to go back to basics and capture the simplicity and elegance of traditional writing instruments. In recent years, the development and modernization of writing instruments has resulted in traditional writing instruments, such as fountain pens, falling into obscurity. It was TWSBI's goal to bring the past back to life by creating a traditional fountain pen that even modern day society can appreciate.

The TWSBI Diamond 580 is a classic fountain pen with a piston ink-filling system. By fusing the traditional mechanisms of the fountain pen with a modern industrial design, TWSBI has created an eye-catching fountain pen that is simultaneously appreciative of the past and relevant in the present.

TWSBI's belief is that it is important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen. These pens also come packaged with a wrench and silicone grease. Neither of these accessories are intended to be used immediately, as they are for long-term care and maintenance. Additionally, please use extra care if you choose to disassemble the nib and feed, as the feed is very fragile.

You may notice a white substance on your 580AL or 580ALR pistons. This is bearing grease, and must not be removed during cleanings, or replaced by silicone grease.

Fountain Pens

Whether or not the barrel of the pen is translucent, allowing you to see the ink and filling mechanism inside.

Body Material
Cap Rotations

For pens with a screw-cap closure, how many rotations it takes to uncap/recap the pen.

Cap Type

How the cap is opened/closed from the barrel of the pen. Some common options include Snap-Cap, Screw-Cap, Magnetic Cap, or Capless (no cap).

Compatible inks & refills

Which ink this pen will accept. Choices include bottled ink and various styles of pre-filled ink cartridges.

Bottled inks
Filling Mechanism

How the pen fills with ink. Click here to watch our video tutorial on common filling mechanisms.

Grip Material
Nib Size
Extra-Fine, Fine, Medium
Nib Color
Nib Material

Whether or not the cap fits securely onto the back of the barrel when open.


Whether or not the nib/tip can retract into the body of the pen (usually for click or twist-open style pens).

Diameter - Body
13.3mm (0.52in)
Diameter - Cap (without clip)
14.4mm (0.57in)
Diameter - Cap (with clip)
18.6mm (0.73in)
Diameter - Grip (mm)

Measured from the place most people choose to rest their fingers, which varies with each pen.

Length - Body

The measurement from the back end of the barrel to the tip of the nib.

130mm (5.12in)
Length - Cap
60mm (2.36in)
Length - Nib

The measured length of the visible portion of the nib when it is installed in the pen, from grip to tip.

19mm (0.75in)
Length - Overall (Closed)
142mm (5.59in)
Weight - Body

If a converter is included with the pen, this weight is reflected in the total.

17g (0.60oz)
Weight - Cap
14g (0.49oz)
Weight - Overall (g)
Max Ink Capacity - Piston Vac

The maximum volume of ink that can fit in the pen when using the built-in piston or vacuum filling mechanism.


Customer Reviews

Based on 133 reviews
Cathy C.
Twisbi Diamond 580AL

I bought this for a friend for Christmas and could not have been happier . She loved it.

Great pen!

I purchased this pen about three months ago and have used it nearly every day since then. I love it. It writes smoothly, the weight feels right in my hand, and the craftsmanship is excellent. My Baystate Blue ink looks cool in the pen and it flows pleasantly through the nib. Good purchase, and one of the best pens in the $70 range.

That's M.G.
TWSBI Makes Gnomes Happy (Broad nib)

This is my 3rd TWSBI, which goes with my black vac700r (1.1 stub) and transparent green Eco (Fine). I figured I'd try out a broad nib just for kicks. I did also buy a Fine nib unit, since I love TWSBIs for EDC pens and prefer an F for taking notes and general writing. I didn't use the fine yet, so this is about the broad. Inked with Robert Oster Candy Red, and so far I've written only on Rhodia since I had a pad out for work notes. The broad nib is crazy smooth, and has the perfect flow for me. It's wet enough that I can do figure-8's for days, but not so wet that it impacts drying time or makes a mess. It's just a tad lighter, narrower, and maybe 5ish mm shorter than my vac700r. I really only mention the width because it doesn't flare out right at the cap threads like the vac700r, which was the only thing that ever bothered me (slightly) about the other pen.Compared to the Eco, the 580AL is VERY similar in size, filling, etc. It's notably heavier, and has a more premium look/feel, particularly with the cap. I -adore- my Eco, but this 580AL is like the Eco grew up, got a sweet job, and has an appreciation for fine clothes. Man, I almost feel a little bad for my Eco... I couldn't really have chosen between it and my vac700r, but dare I say I think I like this new pen more than both. I'm sorry, my children. I have 11 pens currently, and of the 6 I keep inked, half of them will be TWSBI now. The other three are for more focused writing with crazy inks that require a bit more determination than I'm prepared to use when taking notes. Seriously, this thing is glorious!The only negative I've noticed was a bit of play in the filling mechanism when you start turning it. I'm not sure why that is, but it's rock solid when you're not actively turning it. I guess it turns -maybe- an 8th turn at most before it catches and the plunger starts moving. It doesn't affect the pen in any way.

Excellent experience

I really like it. I have vintage Parker fountain pens and I thought that was the way fountain pens are supposed to write! This is a revelation!

Twsbi Diamond 580 AL

Great Pen with buttery smooth nib. Especially love the amount of ink it holds.

FAQs about Fountain Pens

How do I fill a fountain pen with ink? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

It depends on the pen's filling mechanism, which you can find in the Technical Specs section above. 

Here's a quick definition of the most common filling mechanisms:

  • Cartridge - A small, disposable, sealed plastic reservoir that holds fountain pen ink. These come pre-filled with ink, and typically you just push to insert them into place and you'll be ready to write! Check out our quick guide here.
  • Converter - A detachable and refillable ink reservoir that allows you to use bottled ink in a cartridge-accepting pen. Typically you will install the converter into the grip section, dip the nib/feed into the ink, and twist or pull the converter knob to draw ink into the converter. Here's a video for how to fill a cartridge/converter pen using a LAMY pen as an example.
  • Eyedropper - A pen that utilizes the entire barrel as a reservoir for ink. Ink is directly filled into the barrel, allowing for a high ink capacity. Here's a video on how to do it!
  • Piston - A type of filling system that uses a retracting plunger inside a sealed tube to draw ink into a pen. They are typically either twist or push-operated. These pens cannot accept cartridges or a converter, and only fill from bottled ink.
  • Vacuum - A push-style piston that uses pressure to fill the large pen body with ink. They seal the ink chamber when closed, making it ideal for flying without risk of leaking. Check out our video on how to use a vac filler here.

Check out more info on these filling mechanisms including a video on how to fill each one on our blog.

How do I clean a fountain pen? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

It depends on the filling mechanism, but it mostly comes down to flushing it out with water, and sometimes a little bit of Pen Flush if the ink is really stuck. 

It's a bit easier to show than to tell, so we've put together a few quick videos showing you the process:

How often do I need to clean my fountain pen? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

We recommend a good cleaning every 2 weeks, and any time you change ink colors. 

Water will usually do the trick, but we recommend you use our Goulet Pen Flush if the ink has been left in the pen for a while and could have dried up, or when you’re switching ink colors.

My pen won’t write! What do I do? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

First things first... make sure you have ink in the pen! Be sure that the ink cartridge or converter is seated properly in the pen, and that you aren't out of ink.

We always recommend you give your pen a good cleaning first, using our Goulet Pen Flush, or a drop of dish soap in some water. New pens often have some machining oil residue left in the feed, so a good cleaning often does the trick first.

If that still doesn't work, try priming the feed. This consists of either dipping your pen nib and feed in ink, or forcing ink from the converter down into the feed. 

If it’s still not working after that, please reach out to us so we can help! 

What's your return policy? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

You can submit a return request within 30 days of your order date. You can read all our Return Policies here.

To initiate a return, please submit a request at the Return Portal. Our Customer Care team might reach out to you for more information.

Please note we are unable to accept a return of any Namiki or Sailor Bespoke fountain pen for any reason once it has been used with ink. Please thoroughly inspect and dry test the pen before use.