Great new water-based paint marker for fine line writing and drawing details! Extra fine pin-type tip is .7 mm. This is a felt tip in metal casing, different from the plastic tip in the PC-1M Extra Fine marker. The PC-1MR barrel is a little longer and slimmer than the PC-1M. Great for glass and chalkboards- can be cleaned off non-porous surfaces with glass cleaner. Will color well over other paint colors once they are dry. Opaque marks are great on light or dark surfaces. No feathering or bleed-through. Water/Fade-resistant and odorless. Not just metallic anymore- now available in a range of new colors!!