OHTO Graphic Liner Needle Point rollerball drawing pens produce the same fine and consistent lines as fiber-tipped drawing pens but with a sturdy metal rollerball tip instead! This means that you'll be able to use every last drop of the waterproof, lightfast, archival-safe pigment ink without having to worry out about wearing out the pen tip over time.

This is the Size 05 pen, which has a 1.0 mm tip and "05" printed on the cap.