5Pcs 3.4mm Meet International Standards Plastic Pump Cartridges Fountain Pen Converter

Pretty good

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Pretty good

Top

Useless for me, a private person doesn't know what to do with international standards. They don't fit in my pens. The hole is too big.

Thank you very much. All went well. I'm happy for them. Good health and good sales. Sincerely, Mirel

Excellent quality and very good price. Totally interesting and recommended.. Good arrival and delivery time...👍🙂

Advantages: Too wide mouth is not universal size. Disadvantages: mouth is too wide

I thought the ink was somehow in there. But now I know. Are good.

According to what you see on the site but I haven't tried it yet ...

Cool things, fit in the fountain pen as a cartridge replacement ✒️

I await the arrival of the pens to test it

Thank you very much for the products!

Goods as described

According to the offer.

Everything great

Is working!

Suitable for Parker pens. Over time, the original Parker piston adapter stopped working, and after washing it started leaking altogether. Now I have five Parker adapters!

Great item. Works well. Delivered what I asked for in sturdy packaging. Great deal. Delivered within the agreed date.

There is no tightness, it does not hold in the pen at all, and besides, the cartridge is pushed out by the piston

Good. They don't leak.

As in the description!