Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Pen Ink, Refills & Cartridges
Origin	-
Ink Color Options	Pure Blue, Black, Red, Blue-Black
Caliber Size	3.4mm Universal Standard
Compatibility	Fits most international standard fountain pens
Package Quantity	50 cartridges per box
Target Audience	Elementary school students and office workers
Material	High-grade plastic with sealed foil cap
Ink Type	Water-based dye ink
Shelf Life	3 years from manufacturing date
Origin	Factory Direct Supply
Usage Scenario	Daily writing, calligraphy practice, and note-taking

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Perfect for my child's school supplies

These cartridges fit my son's fountain pen perfectly. The blue-black color is exactly what his teacher requested, and the price for a bulk pack is unbeatable.

Anonymous

Mar 27, 2026

Rating: 4/5

Solid everyday cartridges

Nothing fancy, just reliable ink for everyday writing. The pure blue is a lovely shade. Would recommend for students.

Anonymous

Mar 19, 2026

Rating: 5/5

Universal fit as advertised

I was worried these wouldn't fit my vintage pen, but the 3.4mm caliber is truly universal. The red ink is vibrant and great for grading papers.

Anonymous

Mar 18, 2026

Rating: 3/5

Decent ink, some leakage issues

The ink color is nice, but I found two cartridges in the box that had leaked slightly inside the plastic wrap. The rest worked fine though.

Anonymous

Mar 12, 2026

Rating: 5/5

Great for bulk buying

As a teacher, I go through a lot of ink. This factory direct option saves me so much money compared to brand names, and the quality is surprisingly good.

Anonymous

Mar 04, 2026

Rating: 4/5

Good value, smooth flow

I bought the black ink for my daily journaling. The flow is consistent and doesn't skip. One star off because the packaging was slightly crushed on arrival, but the cartridges themselves were fine.

5 FAQ

Q: Can I use these in a converter instead of directly inserting them?

A: These are pre-filled disposable cartridges. If you wish to use a converter, you would need to purchase bottled ink instead, as these cartridges cannot be refilled.

Q: Is the ink waterproof?

A: No, this is water-based dye ink designed for smooth writing and easy cleaning. It is not waterproof and may smear if exposed to water.

Q: Do these cartridges fit Lamy Safari pens?

A: Yes, Lamy Safari pens use the standard 3.4mm international cartridge size, so these will fit perfectly.

Q: What is the expiration date on these cartridges?

A: Our cartridges have a shelf life of 3 years. We ship fresh stock, and the manufacturing date is printed on the bottom of the box.

Q: How many cartridges are included in one order?

A: Each order includes a box of 50 cartridges. You can select your preferred color mix or single color during checkout.

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