Faber-Castell 185506 Standard Ink Cartridges Standard Black

Great and do not leak

These refills are great for fountain pens. They click on the the pen tap and the ink writes very smoothly.

Let's honest, it is just ink. Now as a fan of ink and all things pen related I will say that this is great ink, in a form factor that is a perfect fit for the pen. Beyond that, not going to change your life.

Ink flows just fine. Luv the color

This product was a good purchase for me. One thing you might think about is purchasing multiple items when you purchase something small like this. One item's shipping can be more expensive than the item...I purchased this item in bulk. Thanks.//Chuck

These ink refills are so easy to use.

Works perfectly. I like black ink.

The ink doesn't flow through the cartridge into the pen. It writes okay once it gets there. Maybe the ink was old? To conquer the problem, I take the cartridge out and pound it on a paper towel. Ink flows for a bit and then it does the same thing. Every cartridge in the box has done this. Don't recommend purchasing from this supplier again. Or, perhaps it is the faber castell ink itself? The green ink worked fine and my nib is new.