Pilot Hi-Tec-C 025 Gel Ink Pen, Hyper Fine Point 0.25mm, Red Ink, LH-20C25, Value Set of 5

Simply the best. The sturdy metal tip produces a solid, thin, clear red line. You won't find anything better, especially at this price.

I used these in my engineering studies to redline sketches and make general notes ... Superior product ... Made in Japan and they're masterful at precision machining, world leaders ... For those of you that have dried up pens upon receipt ... I've followed up with warranty requests before and have had no problem, Amazon makes it easy ... Like I said, these are precision pens and are top of the line!

Great brand and product. Hard to find something that’s fine enough for my tiny writing tasks. Happy with my purchase.

Précision tip. They have a tendency to clog at some point if I don’t use them enough. But I like them enough to not care about that problem.

This is extra fine. The print was too thin for others to see. Even in red ink.