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

If you take a 3/32" drill bit and hand-twist it through the tip of the pen, it will allow this refill to fit perfectly. The largest size I could find the Grand offered in was a .7mm. I like the heavier weight of the pen itself, but wanted a slightly bolder line and this worked perfectly.

Caution when you knock off the little red seal it’s only good for maybe 2-3 weeks of no use before it dries up/loses pressure

I use these to replace all my Pilot G2 type refills. Works nicely in a metropolitan . this dries so fast it might as well be instantly. and the sizes under 1.0 mm are instant! Color is dark and the flow is smooth. Pilot might make the better pen body but Zebra makes the better refill.

Great buy! Hard to find item!

Refills received were old an dried out. Most of the red cover tips were floating in the package. Even one that partially wrote was thin and skipped ink. Again, seller is selling old merchandise.

I'm in sales so I use this pen daily. I'm hooked on the overall performance of this writing instrument. The best part, it's not expensive but works well.