Uni-Ball Eye Ultra Micro Rollerball Pen 0.38 mm Colors:Red 0 mm — and are

0 mm — and are filled with a water-based dye ink formulated for the dual-plate capillary feed used in that pen series

The Sharpie Fine Point is a nontoxic permanent marker used for autographs

The 2mm tip balances detail work with coverage

Each pen can be filled with pretty much any liquid ink or water-based paint

putting all 108 color-coded slots in view at once while you're working

Uni-Ball Eye Ultra Micro Rollerball Pen 0.38 mm Colors:Red 0 mm — and areThe Eye Ultra Micro uses a 0. 38 mm tip, the thinnest in the Eye liquid ink line, putting down a needle sharp line around 0. 2 mm wide fine enough for dense tracking grids or detailed entries where a standard 0. 5 mm tip would already feel too thick. Most pens get scratchy or start skipping at this small a tip size, but the Uni Flow capillary regulator keeps ink pressure steady through the barrel, so the line stays smooth rather than catching on the