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]

Price is really good and working good and good shape

I like Sharbo pens, but I hate these cartridges. They run out so fast. Within a couple of days and filling a few sides of A5 paper, they are gone. Previously, Sharbo cartridges have tended to last me at least a few months, as one would expect with a high quality pen. But these cartridges are clearly inferior quality. I want a refund, as this is a rip-off.

These work great! I love the fine point and the look of the ink. They don’t last forever because they are small and made to fit certain barrels that can’t hold more ink. Love these!

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

There is unfortunately not many options when it comes gel refills in the small D1 format. D1 is mainly used in smaller pens or commonly in multi-colour and multi-refill pens. Pens like this typically use the ballpoint refills, like my Rotring 600 3 in 1. Since I can't stand writing with ballpoint ink (except maybe the Uniball Jetstream), having the option of using gel with the Zebra JSB-0.5 was enticing for me. Each refill is about $3, which is not cheap considering the volume of ink that can fit in the D1 refill.The Zebra JSB-0.5 ink fits perfectly in my Rotring 600 3 in 1 pen. Writing with this Zebra refill is generally good, that is mostly smooth without skipping. However, it is not as smooth as the Pilot G2 or Uniball Signo DX pens and refills. The ink is dark but again, not as dark as the G2 or Signo DX. Despite the Zebra JSB not being my favourite gel ink, it is certainly much, much better than the Rotring ballpoint refills that came with my Rotring 600 pen. While the ink didn't last as long as all my other gel pens, it certainly wasn't terrible. I would still recommend the Zebra JSB-0.5 Gel Refill if you want a good quality gel ink in the D1 format.