The uni-ball PIN is an excellent artists pen. The fineliners contains 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 pack gives you the choice of 12 hard working PIN pens in eight of our essential black PIN nib sizes from delicate 0.05mm to a robust 0.8mm tip.