MUJIAluminum Body Fountain Pen Cartridge Refills,2 Black Ink Refills

Perfect. Works well just takes time to let the new ink steep into the tip of the pen if you haven't used it in a long time.

Muji ink is great i would have ordwred the larger pk but was unable to find it when i ordered so toe it was worth getting the 2 pk.

Excellent refills!

I am an older Palmer Method trained writer and learned with a wooden pen with a Nib and an inkwell. I still prefer to use a fountain pen forany important or formal writing. These cartridges allow me to do that in an Oh so easy manner. Hai!I will continue to re-order as necessary being fully assured that though these cartridges are made in Japan they will arrive at my front door in a timely manner and in perfect condition ready to be used. Hai!I am very satisfied with this finely crafted product. Hai!

I have the Muji aluminum body fountain pen and the Muji cartridges for this pen the best. Other brands of cartridges don’t stay in place and end up leaking ink everywhere. I have returns to the Muji brand cartridges and will refill them if I can’t source them easily.I do wish Amazon carried them in something more than packs of two.

The ink wasn’t as opaque as I thought it’d be but overall it’s pretty good

I have been getting into Fountain Pens lately and I was actually surprised that they had pens with replaceable cartridges. These work great and seem to last a long time as I am only about halfway through the first cartridge. I will be getting more of this brand because they ink comes out smooth and very reliably.

Fits my pen and flows nicely. Dries pretty quick, as well. It's not one of the darkest inks I've used, but I'm not complaining.