DunBong Blue Ink Refill Pack of 5, Replaceable Ballpoint Pen Refills, Medium Point Metal Refill (Blue)

Son muy buenos y duraderos,solo me gustaria una caja con mas unidades,esa solo trae 5 unidades.

Great replacement for your pens

Very good quality. great value. Works well with my pen. Delivery was prompt.

Great refill for a pen until it wasn’t. Second cartridge exploded in the pen but the pen was taken on flights so maybe it was the pressure? Not sure!

If you are like me, I get anniversary, special events, commemorative type pens from my corporate employer. All of the pens are nice but they use Universal refills. I tried all different replacement brands and they all did not last long. Until I bought DunBong refills, out of the box the refill writes smooth and without problems. Highly recommended and satisfied with my purchase.

Bought my husband the bolt action pens for Christmas but when the ink ran out he thought the pens were done. Nothing pointed me to what kind of refill so I took a chance & these worked perfectly

I have a company pen (generic) that I love writing with. Well, the ink died so I took it apart and looked for a replacement ink refill. I also decided to upgrade myself to blue ink, vs the original black ink.The blue ink refill doesn't completely retract.If you look at the photos you can see the differerence in length of the thin tip is longer for the blue pen. The overall length is the same, but the thinner part is slighly longer which is keeping the pen from retracting fully. Maybe it's because it's blue, not black? But I am not willing to spend more money to find out.I've only tried it in the one generic company pen thus far. If i get another pen I need to refill and it works better, I'll update the review.

That's a "perfect" refill for my pen. When I bought this pen, it came with black ink, and I hate black ink. The pen manufacturer does not provide blue refills, so I was really happy to find this product. It works for the most part, but sometimes the cartridge fails and leaks ink, specially in very hot weather. As long as don't forget the pen inside the car on a hot day, or keep in in my pocket when I am outside for too long, it will be all right. Other than that it is a great product.