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I had three nice pens which were out of ink. They all used this refill. The tiny batteries for the light in the pens is easier to find. I thought about finally discarding the pens. I searched again and found these with a different colored plastic end. I took a chance. They are perfect replacements. The pens write as well as new with the same color and line thickness. I didn’t want this many and I hope they will not dry out before I need the last one. When I considered all the time I spent looking for these the price is a good price.

Works as advertised

so far so good. This product takes FOREVER to be delivered.

The price for these refills is just perfect. Smooth writing until the end.

Fits fine, but it only lasts a few days of regular use and they are an extra fine point -easily tears paper.

These ink cartridges literally saved the life of my pen. I simply inserted them and my pen respawned with full life!

I had received a pen as a gift, that lights up to print in low light or darkness. Although I liked the idea, unfortunately, it had blue ink, which I can't use at work. Plus, I like fine-point pens, and this was not. >.< I hated to toss the pen and decided to see if I could find the right ink for it. I DID! I have no idea what brand this pen is, but I followed the seller's instructions. It was the perfect length refill, AND fine-point! Happy!

Perfect size for my pen. Couldn’t find them in the office supply store near me. Amazon came through again!