4.37 inch Rollerball Pen Refills, Roller Ball Fine Point 0.5mm, Blue Ink Refill Pack of Replaceable Pen Refills Medium Point (6 Pack)

These 4.37 inch Rollerball Pen Refills offer great value for anyone looking to keep their favorite pens going strong. The 0.5mm fine point delivers smooth, precise writing with every stroke, and the black ink flows consistently without any skipping or blotching.The refills are easy to replace, and the pack provides an excellent quantity for the price, making it cost-effective for those who write a lot or go through refills quickly. The quality is comparable to higher-priced refills, which makes this an even better deal.If you're a fan of rollerball pens and want to stock up on reliable, affordable refills, this pack is a perfect choice.

Fits and works great for my pens.

There are five rollerball refills in this package. I tried two of them. One skipped terribly. I thought it might be something on the paper so I tried it on another sheet and it did the same thing. The second refill left golbs of ink that bled through the paper. I guess these might be from a bad batch but I don't feel like fooling with them so back they go.

You have to get these metal refills for the rollerball pens like Duke and Nekigoen. The plastic Schmidt refills do not fit even though they look like they would (metal tip is bigger). These roller ball pens are hefty and smooth writing. They give the look of a fountain pen without the ink cartridge mess.

Nice refills for the Sheaffer pen I have (brand not listed in specs, but measurements seemed right). The rollerballs are not as silky smooth as the original ink cartridge that came with the pen. I usually like medium point rollerballs, because fine point are "scratchy," but these are medium point and still a bit scratchy. No rating on longevity, because I haven't used them for long enough to assess.

These refills write very light , skips, and are not smooth at all. You can hear the refill scratching on the paper (which I hate hearing that sound.) Does not fit pens described. Does not fit well in TUL brand or MontBlanc pens.

These work perfectly for the pen that I have. They write smoothly, and the ink lasts a long time. And I feel that it’s a great value for the cost.

They gave a free blue refill which was very nice. However, you get what you pay for. The price is cheap and the refills can get the job done, if you’re on a tight budget and just need at least something to write with.I’m a pen snob and I write a lot so the experience was underwhelming. It is scratchy, not smooth at all, and the ink flow stops every once in while. My hand started cramping after writing half a page, so I will be throwing away this 1st refill and trying another one. Hopefully the others ones are good. I will update my review once I’ve gone through all of them.Update: Only 2 refills was barely passable for me. The other 4 were too scratchy or skips a lot.