PenGems standard ballpoint refill cartridges hold the same ink that you love in your pens, but in a medium size. You can stock up so you'll never run out of ink. They are D1 ballpoint refills and will fit a wide range of compact and multi-function pens. The writing length of these refills is measured at 350 meters.
Ballpoint
Medium / 0
5.0
57 ratings
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These are perfect and so easy to swap out. I bought all the colors so my options would be unlimited.
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Stephanie · October 26, 2026
I like how easy it is to change the cartridge. I k writes so smoothly in every color I have tried. I do wish there were even more color options. It would be cool if there was ink to match the pen….
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sandra · July 15, 2026
They wer out of the thinker ink and loved this ink after all.