Perfect if you make a mistake this pen is erasable! The pilot Frixion Clicker rollerball allows you to write, delete and then re-write with the same clever pen. The gel ink responds to the heat generated by the rubbing out and disappears allowing you to re-write over it.. Frixion it - Remove your mistakes by rubbing with the eraser stud and watch the ink disappear. Thermo-sensitive ink . Refillable . Ergonomic Grip . 0.7mm tip gives a 0.35mm medium line. Colours - Red, Blue and Black