Frixion Clicker pens write smoothly and erase cleanly without smudges or marks, keeping your notes clean and easily legible. The ink that refills these Pilot pens is heat sensitive, erasing with the friction from the included erasers. Use the refills with frixion ball and frixion Clicker pens. Fine Point is excellent for everyday office use. Compatible with frixion ball and frixion Clicker pens. Greener choice - contains 20% postconsumer recycled content. These erasable gel pens come in Black ink.