on saleDiplomat Magnum Fountain Pen - Hot Pink

Product Code DP-D40909021

In Stock

out of stock

on saleDiplomat Magnum Fountain Pen - Hot Pink

Product Code DP-D40909021

In Stock

out of stock


MSRP $33.00

Nib Guide

Not sure which size nib is best for you?

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

This hot pink resin Magnum fountain pen is one of Diplomat’s most affordable offerings. The special no-slip lacquer gives the body a soft touch, and it has a black ergonomic grip section. It comes equipped with a smooth writing JoWo stainless steel nib, chrome trim, and fills via standard international cartridge/converter (both are included).

Note: The Diplomat Magnum is gradually transitioning from matte to polished nibs. What you receive may be different than what is pictured here.

Click to shop all compatible short or long standard international ink cartridges.

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 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, Standard international long cartridges, Standard international short cartridges
Filling Mechanism

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

Cartridge, Converter
Grip Material
Nib Size
Extra-Fine, Fine, Medium, Broad
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
11.5mm (0.45in)
Diameter - Cap (without clip)
12.2mm (0.48in)
Diameter - Cap (with clip)
15.5mm (0.61in)
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.

123.9mm (4.88in)
Length - Cap
52mm (2.05in)
Length - Nib

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

17.1mm (0.67in)
Length - Overall (Closed)
133.3mm (5.25in)
Length - Overall (Posted)

When the cap of the pen is posted onto the back of the pen body, this is the measurement of the entire pen including the nib.

151.7mm (5.97in)
Weight - Body

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

7g (0.25oz)
Weight - Cap
7g (0.25oz)
Weight - Overall (g)
Max Ink Capacity - Cartridge

The maximum volume of ink that can fit in the pen when using a cartridge.

Max Ink Capacity - Converter

The maximum volume of ink that can fit in the pen when using a converter.


Customer Reviews

Based on 18 reviews
The Secret to the Magnum is Lubricated Ink

What first caught my eye on the Diplomat Magnum was the color, price, snap cap, and another German company since I'd already been writing with a Lamy Al-Star (Medium) for 6 months, and dip pens for years before that. I liked the look of the breather hole and etching on the polished nib. What made up my mind to purchase was hearing Brian on the Pencast saying the Diplomat Magnum had a softer nib than some gold nibs (Ep. 49, Q&A Section 41:45). When the pen arrived, I went through the "5 Steps for Getting Started with a New Fountain Pen" video, which included a cleaning to prevent a waxy feel from the leftover machining oils. After inking it with Waterman Tender Purple and confirming the soft nib, I found more to love: pearlescent finish, ink windows on both sides, solid finial, caps tightly, and still writes after 3 days unused. Did I mention the Fine nib is smooth? I have small hands - Small glove size, for example - and the pen feels comfortable with or without the cap posted. Just be gentle with the cap, as others have had it crack if pushed down too hard. The faceted section supports my "dynamic quadrupod," aka 4-finger, grip well. I like that the bottom of the clip curves out so it's easy to slip into my backpack pen slots. If I lose this, I won't hesitate to contact Goulet to buy another. So far, I've had it for 3 months shy of 2 years, and I happily write with it nearly day.Also, I bought the "Water-Resistant Black" sample set to see which worked best with the Magnum. I primarily use my Magnum on my planner, which is ordinary copier paper. Out of the 8, Noodler's "Black Eel" worked the best for me to prevent the first stroke from not writing or skipping in the middle of a word. Runner up was Noodler's "Heart of Darkness." The least cooperative was Sailor's "Kiwaguro Pigmented Black," as it often would not flow to write and I'd have to run it under the faucet for a couple seconds to get it to write again. Others tested were Noodler's Black, Noodler's X-Feather Black, Platinum Carbon Black, DeAtramentis Archive, and DeAtramentis Document Black. The secret to why the Black Eel ink worked best on the Magnum is that it's a lubricated ink. In dry environments - like mine in the semi-arid Midwest (think 20% humidity in the winter while the humidifier is on) - the lubrication included in the eel ink keeps it from drying out. It's also gives me more time - around 30 seconds to a minute - to leave my cap off while waiting for the next enlightening line from a sermon or lecture. Otherwise, I cap the pen whenever I pause writing, and that doesn't bother me; the nib is worth it. Other lubricated inks include the entire Monteverde and Private Reserve brands, and any of the Noodler's Eel line, including Purple Heart. Of those brands, I currently am using the Monteverde Blue Skies and am having the same good results. The secret to the Diplomat Magnum is lubricated ink!

Jill E.
Great Everyday Pen

I love this pen, especially for everyday use. It's not bulky in my purse. Fits comfortably in my hand. Writes beautifully. The grip is much narrower than I'm used to, but once I got used to it I really like it.


Great pen


Great pen

I love it!

I ordered this pen to allow a second ink color. I purchased the same model in iridescent blue earlier and it has been my go to for journaling. I just wanted some color variety. The nub writes smoothly, ink flow is even, and the converter fills nicely. Fabulous pen, a great value, and cute too!

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.