12 Pieces Pen Refills Blue Ink 1.0mm Medium Point Metal Ballpoint Refill Smooth Writing Pen Refills Replacement Refills for Retractable Ballpoint Pen School Office Supplies (Blue)

I have an old tac pen that finally needed some new ink cartridges. It normally takes Parker cartridges but with the price going from 2 dollars to 10 I felt that it was time to find a substitution. These cartridges get it done, they fit perfectly and the ink writes well. The only issue that I had was the rubber that they place over the nib can be very hard to get off. Other than that they are great. Why pay 10 dollars for 1 when you can get 12 for 5. It's essentially the same thing.

fits my favorite pen

Just received my refills. 12 Parker jotter refills for $6 is one heck of a price. I just tried one in my pen and the fit is fine and the ink appears to flow smoothly. I am very satisfied with the purchase. The only question will be durability - how long will the ink flow, will it continue flow evenly and will the cartridge leak. For now, I'm very happy with the first of twelve. I will update when, and if, things change.

They seem to write just fine, I can write just holding the refill part by itself. But they are too tight to work in the blingy ballpoint pens sold in "bulk" from China; there seems to be no refills for those. Those pens want a 3.9 inch long refill with a 1mm point and a 1cm width tube. That's what these are. I expect these refills would work fine in other kinds of pens, just not the blingy pens.

I’m very pleased with these ink replacements. My company gave me a pen I actually like and I was disappointed when the ink ran out. Thought I would give this a try, wasn’t sure if it would fit or not. They are easy to use and write great. They actually fit in several pens I had around the house. I recommend them!

Exactly what I needed. Well packaged.

The economical way to stick with your most useful pens. We all have the pens we like to use and depend on and we know the reasons why. They are personal. So, if they run out of ink with these refills it's just a matter of unscrewing the top removing the empty and dropping in the new cartridge. And then, screwing the top back on and you are ready to work again - just that fast. Even the prices are quite reasonable for the convenience. I recommend these refills !

These write fine with smooth ink as long as you hold your pen straight up & down. But for elegant elongated writing, these are a bust. The ball barely reaches past the end of the cartridge hole so you're basically scraping paper as you write. Photo: I put 2 inserts from the pack into 2 of my nice pretty pens ☺️ The rest are visible still in the pack, and next to them are a few I removed from the old pens to show what type came out - just a visual that the replacements fit just fine. So, may be good for writing in all caps as some do, but for proper cursive? Nah. Lol