Zebra 0.5mm Black Gel Ink Refill (RJSB5-BK), for Zebra Multi Function Pen Shabo X Ballpoint Pen, × 5 Pack/total 5 pcs (Japan Import) [Komainu-Dou Original Package]

Great flow and smooth writing. These fit perfectly to replace a portable pen. Great value and worked better than expected. Will purchase again.

Since the hot topic with these refills is how they can't write for long, I wanted to objectively see for myself. I loaded this refill into a Zebra Techo T-3 Mini Pen and wrote in a 9.75" by 7.5" wide-ruled composition book until the refill died. I was expecting about 3 pages or so but was kinda blown away when I got just shy of 10 and a half pages. This is my first experience with D1 refills, and now I feel like they are kinda legit if you wanna carry a very small pen.

I filled 30 of 48 pages of my 3.5" x 5.5" Field Notes pad with one of these refills. The ink is smooth and much darker than the Uni Jetstream refill (SXR-200-05). I prefer this ink and will continue to use it in my pad

I like the bold, clean line that this refill leaves. It writes smoothly. I am new to D1 refills and was surprised by how little ink there is, but I understand that is the nature of the D1 refills and am not disappointed.

These pen refills write really smooth but be warned they don't last long!

greatest writing instrument ever!!I love hand writing and this pen is the best . . . .but can't run down to the office store to buy. So finding it online is the greatest

3 of the refills didnt work right out of the box. (2 skipped repeatedly and 1 wouldn't write at all) seems like these were old stock lying around and dried out. poor choice wouldn't recommend.

this is exactly what i was looking for! i wanted to replace the ballpoint ink that came with my pengem and this works! its nice that i get 5 refills and now i'm happy to have that gel ink