Uni-Ball Eye Ultra Micro Rollerball Pen 0.38 mm Colors:Red Each pen can be filled

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

The more light it absorbs

highlights pop instantly with white gel pen or gouache

These gloves are built as solid work gloves

Uni-Ball Eye Ultra Micro Rollerball Pen 0.38 mm Colors:Red Each pen can be filledThe 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