Erasable fiber pen with thermosensitive ink. Fiber marker with a plastic cap for easy erasing of writing ink. Erasable without leaving any residue. In dark green color. Tip: 2.5 mm. Line width: 0.63 mm. The cap tip can be used as an eraser. The FriXion Colors is an innovative, erasable fiber marker filled with thermosensitive FriXion ink. Perfect for when you've been a bit too enthusiastic while coloring, sketching, or doodling and have put too much color on the paper. Simply rub the plastic tip on the cap over the paper, and the ink of the FriXion Colors disappears (at around 60 °C of friction heat). Its stable tip with a medium line thickness provides excellent pressure capability for coloring and detailed sketches without fraying. Erasable. Ink that can be erased without leaving any residue.