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Best Diplomat Pen Refills of 2026

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Jordan Akhtar

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For those who appreciate the art of writing, Diplomat pen refills offer a high-quality and reliable option to keep your favourite pen flowing smoothly. Whether you prefer ballpoint or rollerball, Diplomat refills come in a range of colours and sizes to suit your writing needs. Designed to fit seamlessly into Diplomat pens, these refills are a great way to extend the life of your writing instrument and ensure you're always ready to jot down notes, sign documents, or compose a thoughtful letter.

At a Glance: Our Top Picks

Diplomat Metal Black Rollerball Refill Cover #TOP 1

Diplomat Metal Black Rollerball Refill

9.8
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Diplomat Spacetec Kingsize Black Ink Refill Cover #TOP 2

Diplomat Spacetec Kingsize Black Ink Refill

9.7
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Diplomat King Size Ballpen Refill - Black Ink Cover #TOP 3

Diplomat King Size Ballpen Refill - Black Ink

9.5
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Top 6 Diplomat Pen Refills

#TOP 1

Diplomat Metal Black Rollerball Refill

Diplomat Metal Black Rollerball Refill Cover

Diplomat Rollerball Refill - Metal Black

The Diplomat Rollerball Refill is a high-quality black ink refill designed for all Diplomat rollerball pens. With a fine 0.7mm stroke thickness, it offers smooth and precise writing, making it ideal for everyday use or important documents. The metal construction ensures durability, giving you confidence that it will withstand frequent use. You will appreciate how this refill elevates your writing experience, providing rich colour and consistency with every stroke.

9.8
FTB Score
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What We Like

  • Compatible with all Diplomat pens
  • Smooth writing experience
  • Durable metal construction
  • Fine 0.7mm stroke thickness
  • Rich black ink colour
#TOP 2

Diplomat Spacetec Kingsize Black Ink Refill

Diplomat Spacetec Kingsize Black Ink Refill Cover

Diplomat Spacetec Gas Pressurised Refill - Black

The Diplomat Spacetec Refill is designed for use with all Diplomat Spacetec pens, ensuring that you have the right ink to keep your writing smooth and consistent. With a 0.5mm stroke thickness, this refill offers precision for detailed writing tasks, making it ideal for professionals and students alike. The gas pressurised feature allows for seamless writing at various angles, even in challenging conditions. Additionally, the black ink provides a bold and clear finish, enhancing the quality of your documents and notes.

9.7
FTB Score
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What We Like

  • Compatible with various Diplomat pens
  • 0.5mm stroke for precision
  • Gas pressurised for versatile use
  • Bold black ink for clarity
#TOP 3

Diplomat King Size Ballpen Refill - Black Ink

  • Diplomat
  • d10444578
  • 1 count (Pack of 1)
Diplomat King Size Ballpen Refill - Black Ink Cover

Diplomat Medium King Size Ballpen Refill - Black

The Diplomat Ballpen Refill is designed for those who appreciate a reliable writing experience. This king size refill features black ink, providing a bold and clear finish with every stroke. Its medium point ensures smooth writing, making it ideal for everyday tasks, whether you are jotting down notes or signing important documents. This refill is perfect for users seeking convenience and quality in their writing instruments.

9.5
FTB Score
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What We Like

  • King size for extended use
  • Bold black ink
  • Smooth medium point
  • Convenient for daily writing
#TOP 4

Diplomat Plunger Refill Converter for Bottled Ink

  • Diplomat
  • d10221059
  • 1 Count (Pack of 1)
Diplomat Plunger Refill Converter for Bottled Ink Cover

Diplomat Plunger Refill Converter

The Diplomat Ink Converter is designed for use with bottled ink, making it an ideal choice for fountain pen enthusiasts. It fits all Diplomat fountain pens, ensuring compatibility across your collection. The twist action feature allows for simple and efficient ink filling, providing you with a smooth writing experience. Plus, its clear plastic design with black details adds a touch of elegance while letting you see the ink level easily. This converter brings convenience and flexibility to your writing routine.

9.3
FTB Score
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What We Like

  • Compatible with all Diplomat pens
  • Easy twist action filling
  • Clear design shows ink level
  • Designed for bottled ink use
#TOP 5

Diplomat Spacetec Kingsize Blue Ink Refill

Diplomat Spacetec Kingsize Blue Ink Refill Cover

Diplomat Spacetec Gas Pressurised Refill - Blue

The Diplomat Spacetec Refill is a gas pressurised refill designed for all Diplomat Spacetec pens, including models such as 0 Gravity and A1. With a stroke thickness of 0.5mm, it ensures precise and smooth writing, making it ideal for both everyday tasks and special occasions. The blue ink offers a classic and professional touch to your writing. This refill provides convenience, as it allows you to continue using your favourite pens without having to purchase a new one, promoting sustainability and reducing waste.

9.3
FTB Score
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What We Like

  • Compatible with various pens
  • Smooth 0.5mm stroke thickness
  • Classic blue ink colour
  • Gas pressurised for reliability
  • Promotes sustainability
#TOP 6

DIPLOMAT EasyFlow King-Size Pen Refill

DIPLOMAT EasyFlow King-Size Pen Refill Cover

King-Size Refill DIPLOMAT EasyFlow do Serii Excellence A Plus Excellence A2 Aero Optimist Esteem Traveller Magnum M Blue/Writing and Correction Products/Security Level-Premium/Colour-Blue

The DIPLOMAT EasyFlow Refill is designed for a seamless writing experience. With a continuous line length of at least 3000 metres, you can enjoy lengthy writing sessions without interruption. It performs well at high altitudes, up to 4000 metres, making it perfect for travellers. Additionally, it operates effectively in temperatures up to 40 °C, ensuring reliability in various environments. The M diameter writing ball provides a smooth blue ink flow, making your writing both enjoyable and professional.

9.3
FTB Score
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What We Like

  • Smooth writing experience
  • Long writing line length
  • High altitude usability
  • Temperature resistant

Editor's Notes

During our Diplomat pen refill research, we found 11 Diplomat pen refill products and shortlisted 6 quality products. We collected and analyzed 4,946 customer reviews through our big data system to write the Diplomat pen refills list. We found that most customers choose Diplomat pen refills with an average price of £8.18.

The Diplomat pen refills are available for purchase. The top 6 picks range in price from a low of £5.00 to a high of £11.00, find the one that fits your budget.

Written by

Jordan Akhtar Avatar

Jordan Akhtar

Jordan Akthar owns one stationery store in Bradford, and another in Derby. He started with a corner bookshop, and now the rest is history. He is often found in his stores taking count of inventories of books and stationery. Jordan also likes to write, and this drove his passion for writing articles on stationery maintenance. He owns a blog, where in his free time, he would write DIY tips on how you can recycle and refine your stationeries.