The uni-ball PIN is an excellent artists and writing pen pen. The fineliners contain fade proof Super Ink so your creations will last. The fine tip pen creates a solid pigment ink line that is clean and precise. The ink is water resistant too so the drawing pens can be used with watercolour and will not smudge when wet. This five-pen pack features a great range of PIN pen sizes. The 0.1 nib creates strong, slender line, the 0.2 and 0.3 nibs make clear, precise marks while the robust 0.5 tip is ideal for definitions and the 0.8 is excellent for heavy outlines and colour blocking. All nibs are excellent when writing, shading, stippling, layering and hatching.