Write, erase and rewrite using the Frixion Clicker retractable pens from Pilot. The smooth thermo sensitive gel ink disappears with friction. Simply use the rubber tail tip on the pen and erase without any residue or tearing of paper. Barrel is equipped with an ergonomic grip. Available point sizes: 0.5mm and 0.7mm Available colours: black, red, blue, green, purple, pink and turquoise Please note: This product is not recommended for signatures, examination papers or official documents. If pen is exposed to extreme temperatures (<-10°C; >60°C), the ink will disappear. To restore colour, cool to at least <-10°C in freezer and ink will reappear.