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59 products
59 products
NOTE: If you choose to add a custom grind to your pen, this will add the time to when it will be shipped.
ECO-T has a slightly more pronounced grip section; to help with learning correct writing posture for kids, new enthusiast, and anyone who likes a little bit more structure to the grip area. Cap and end cap also has a rotary triangular shape design.
Comes in EF, F, M, B, Stub 1.1 nib choices
Pen cap is able to post onto the back of the pen
Piston Filler Fountain pen.https://www.penrealm.com/wp-admin/post.php?post=7435&action=edit#edit_timestamp
Simply unscrew the end cap, dip into ink, screw back the end cap, and your done! Ready to write!!
Pen cap has an inner cap to insure a perfect seal when stored away.
Made for the beginner who just wants to try out fountain pens, all the way to the experts. A good everyday worker.
Please note: Ink is NOT included
A quick no brainer guide in choosing nib sizes in an overly complicated fountain pen world:
If you write small, go with an EF
For the normal writer, F is the most popular
If you tend to lean on a bigger font, M will be perfect
B is for statements!! Sign a check in B, write a header in B, do some coloring/shading in B
Stub nibs are italic in writing style (have a special card or invitation to write?)
The TWSBI Diamond 580 fountain pen blends modern engineering with classic demonstrator style, making it one of the most beloved pens in the TWSBI lineup. Crafted with a faceted, diamond-cut barrel, the 580 beautifully showcases your ink while providing a comfortable, balanced writing experience for everyday use.
Built with TWSBI’s signature piston-filling mechanism, the Diamond 580 offers a generous ink capacity and smooth, consistent flow. The transparent body allows you to monitor ink levels at a glance, while the precision-engineered stainless steel nib delivers a reliable and customizable writing experience. Designed to be user-serviceable, the 580 can be easily disassembled for cleaning and maintenance—perfect for fountain pen enthusiasts who love to tinker.
Aluminum machined grip, connector, and piston rod.
AL Models have a smooth grip section.
ALR Models have a ribbed textured grip section.
The TWSBI Eco fountain pen has earned its reputation as one of the best values in the fountain pen world—combining thoughtful engineering, impressive ink capacity, and everyday reliability in a clean, modern design.
Featuring TWSBI’s signature piston-filling mechanism, the Eco allows you to fill directly from a bottle of ink, offering a generous ink reservoir that keeps you writing longer. The transparent demonstrator barrel lets you easily monitor ink levels while showcasing your favorite colors. Its lightweight construction and balanced feel make it comfortable for extended writing sessions, whether you’re journaling, note-taking, or sketching.
Fitted with a smooth stainless steel nib in a range of sizes, the Eco delivers consistent ink flow and dependable performance right out of the box.
The TWSBI Mini fountain pen delivers the trusted performance of TWSBI’s piston-filling system in a compact, travel-friendly design. Small in size but big on functionality, the Mini is perfect for writers who want the ink capacity and engineering of a full-sized fountain pen in an easy everyday carry.
Fitted with a polished stainless steel nib engraved with the TWSBI logo, the Mini is available in a wide range of nib sizes and the reliable piston-filling mechanism allows you to fill directly from bottled ink, offering generous ink capacity without the need for cartridges.
Despite its compact size, the TWSBI Mini is designed for comfort. The barrel is threaded so the cap can securely post on the back of the pen, creating a balanced writing length that feels natural in hand.
Size & Specifications
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Length: 117mm closed, 108mm open, 140mm posted
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Max barrel diameter: 12.4mm (grip tapers to 9.8mm)
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Weight: 18g
For perspective, the Mini is about an inch shorter than the Diamond 580.
The TWSBI Diamond 580 fountain pen blends modern engineering with classic demonstrator style, making it one of the most beloved pens in the TWSBI lineup. Crafted with a faceted, diamond-cut barrel, the 580 beautifully showcases your ink while providing a comfortable, balanced writing experience for everyday use.
Built with TWSBI’s signature piston-filling mechanism, the Diamond 580 offers a generous ink capacity and smooth, consistent flow. The transparent body allows you to monitor ink levels at a glance, while the precision-engineered stainless steel nib delivers a reliable and customizable writing experience. Designed to be user-serviceable, the 580 can be easily disassembled for cleaning and maintenance—perfect for fountain pen enthusiasts who love to tinker.
The TWSBI Mini fountain pen delivers the trusted performance of TWSBI’s piston-filling system in a compact, travel-friendly design. Small in size but big on functionality, the Mini is perfect for writers who want the ink capacity and engineering of a full-sized fountain pen in an easy everyday carry.
Fitted with a polished stainless steel nib engraved with the TWSBI logo, the Mini is available in a wide range of nib sizes and the reliable piston-filling mechanism allows you to fill directly from bottled ink, offering generous ink capacity without the need for cartridges.
Despite its compact size, the TWSBI Mini is designed for comfort. The barrel is threaded so the cap can securely post on the back of the pen, creating a balanced writing length that feels natural in hand.
Size & Specifications
-
Length: 117mm closed, 108mm open, 140mm posted
-
Max barrel diameter: 12.4mm (grip tapers to 9.8mm)
-
Weight: 18g
For perspective, the Mini is about an inch shorter than the Diamond 580.
This mini comes with Aluminum parts.
The TWSBI Diamond 580 fountain pen blends modern engineering with classic demonstrator style, making it one of the most beloved pens in the TWSBI lineup. Crafted with a faceted, diamond-cut barrel, the 580 beautifully showcases your ink while providing a comfortable, balanced writing experience for everyday use.
Built with TWSBI’s signature piston-filling mechanism, the Diamond 580 offers a generous ink capacity and smooth, consistent flow. The transparent body allows you to monitor ink levels at a glance, while the precision-engineered stainless steel nib delivers a reliable and customizable writing experience. Designed to be user-serviceable, the 580 can be easily disassembled for cleaning and maintenance—perfect for fountain pen enthusiasts who love to tinker.
Aluminum machined grip, connector, and piston rod.
AL Models have a smooth grip section.
ALR Models have a ribbed textured grip section.