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Home / Pen Ink, Refills & Cartridges / HERO Brand Fountain Pen Ink Cartridges - Official Flagship Store, Non-Clogging Bulk Pack, Magic Eraser Compatible, Replaceable 3.4mm and 2.6mm Sizes, Large Capacity for Grade 3

Attributes

Brand -
Category Stationery, Educational Electronics & Office Supplies / Pen Ink, Refills & Cartridges
Origin -
Brand HERO
Compatible Sizes 3.4mm and 2.6mm
Pack Quantity 50 Cartridges
Ink Color Classic Black
Special Feature Non-Clogging Formula
Compatibility Magic Eraser Compatible Pens
Capacity Type Large Capacity
Target User Students (Grade 3+)
Material High-Grade Plastic
Origin Official Flagship Store

6 reviews

A

Anonymous

Mar 27, 2026

Rating: 5/5

No more clogged pens!

I used to struggle with dried ink blocking my pen nibs, but these HERO cartridges have solved that issue completely. Highly recommended for daily writers.

A

Anonymous

Mar 21, 2026

Rating: 4/5

Works well with Magic Eraser pens

Specifically bought these because my pen requires compatible ink. They work exactly as described and the large capacity means fewer changes.

A

Anonymous

Mar 16, 2026

Rating: 4/5

Good quality, fast shipping

The ink color is deep and consistent. I appreciated that they offer both 3.4mm and 2.6mm sizes in one order option, though I only needed the larger size.

A

Anonymous

Mar 09, 2026

Rating: 5/5

Perfect for my child's school supplies

These cartridges fit perfectly in my daughter's fountain pen. The ink flows smoothly without any skipping, and the bulk pack is great value for money.

A

Anonymous

Mar 05, 2026

Rating: 5/5

Reliable official store product

Genuine HERO quality. The ink dries quickly on paper without smudging, which is essential for left-handed students like my son.

A

Anonymous

Mar 04, 2026

Rating: 5/5

Excellent bulk deal

Buying in bulk saves so much time and money. The packaging was secure, and not a single cartridge was leaked or damaged upon arrival.

5 FAQ

Q: How many pages can one cartridge write?

A: Writing distance varies based on nib size and writing pressure, but a single large capacity cartridge typically lasts for several weeks of regular school use.

Q: What is the expiration date of the ink?

A: Our ink cartridges have a shelf life of approximately 3 years when stored in a cool, dry place away from direct sunlight. The production batch date is printed on the box.

Q: Is the ink washable if it gets on clothes?

A: While our formula is designed to be smooth and non-clogging, we recommend treating any stains immediately with cold water. For specific stain removal advice, please consult a fabric care guide.

Q: Can I mix these with other brand inks?

A: To prevent clogging or chemical reactions, we strongly advise against mixing different brands of ink within the same pen. Please flush your pen with water before switching to HERO cartridges.

Q: Do these cartridges fit standard international pens?

A: These are designed specifically for HERO pens and compatible models using 3.4mm and 2.6mm connectors. Please check your pen's manual for size compatibility before purchasing.

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