uni JETSTREAM SXR-80-05 0.5mm Blue Ballpoint Pen Refills - 5 Pack for Multi Pens | Smooth Writing for Office, School & Daily Use

My Uni ballpoint pen with 0.28 size tip is awful...no ink flow. This size is much better and still very narrow line width. Highly recommended.I bought these refills because it said they would fit my Jetstream multi-pen. They are not long enough for my pen and on top of that they are NOT RETURNABLE. What a waste of money and waste of a product. The only thing I can do now is throw them away because I don't need them sitting around collecting dust and getting in the way in my drawer. This ink refill does NOT fit the Uni Style Fit Meister 3 Color Multi Pen. Save yourself some time and waste by getting your Jetstream refills on jetpens.com.I'm not sure what pens people are buying this for, but I was scared to buy the refills for my pen because of the reviews. Bought it anyway thinking that I could return via Amazon if I needed to. opened it as soon as I got it and it fit like a charm. These refills are for the Uni Jetstream Multifunction 4 ballpoints in one with mechanical pencil. (MSXE510005.11 is the pen I have.)It is so nice to find refills for my pens. The Uni-ball Jetstream pens are the best, and getting refills for them makes my expensive pen worth the money I spent. I have been using the 0.7mm and thought they were great, these 0.5mm are even better. GREAT product!!!Perfectly fits the 5-in-1 uni jet stream pens (4 colors + mechanical pencil).Easy change outRefills for what is by far my favorite pen to write notes with. As a medical student, writing small without bleeding/smudging is essential for taking notes on the daily census or in textbook margins. Grab the multi-color pen that these load into and refill away.DUH you should get these rather than buy completely new pins and waste all that plastic! Also, it's more economical. Nuf said. Also. .5 mm is THE BEST.Works Great, easy to put in replacement