Zebra 1.0mm Blue Black Ink Refill (JF-1.0), for Zebra Sarasa Clip 1.0 Gel Ballpoint Pen(JJE15-FB), × 5 Pack/total 5 pcs (Japan Import) [Komainu-Dou Original Package]

The high quality smooth and inky navy blue I expect from Zebra, and I prefer thicker point sizes, which are harder to find in a store than online, and I have tons of empty pen shells so these refills were perfect. Great price too for how hard they are to track down in the US for this size and color specifically

I work in healthcare and with the constant charting or writing you end up with a collection of pens. This one is my favorite. I have a drawer full of other pens but I always reach for this one. I’m thankful Amazon has these refills as I’ve ordered several over a 2 year span. It’s so smooth, and nice to write with. I love it!

Smooth writing, readable ink.

Was happy to find Sarasa blue/black ink refills, but the ink was totally used up in 30 pages of journaling, 7"x10" sheets, wide ruled paper. Normal Sarasa pen with blue or black ink usually lasts for 1 1/2 to 2 journals ( 150 pages per journal, one side only). These 5 refills may last for one journal. Too expensive. Just popped in the second refill. Will update if it lasts substantially longer.

If left for a while (2-3 weeks) they do dry up/lose pressure

Oh Man! is this ink awesome. The color is great, very dark navy. Great for work and its super smooth

I write a lot for work and these are exactly what I need for ease and presentation