Write, Erase, Repeat! NEVER cross out again with FriXion Ball, the ORIGINAL erasable pen from Pilot! Write smoothly with the fine-tip FriXion Ball, erase by heating with the FriXion eraser without damaging the paper and rewrite immediately. Simply rub out your mistakes with the eraser stud and watch the ink disappear as if by magic! The unique patented thermo-sensitive gel ink responds to the heat generated by the rubbing out, and lets you write over your mistake immediately with the same pen. It displays a youthful style with its streamlined body and its tattoo decoration. Available in a variety of colours, there's a FriXion Ball for everyone! Because of the erasable ink, FriXion Ball must not to be used for signatures, legal documents, examination papers or other documents where writing needs to be of a permanent nature. Pack of 4 assorted colour pens (blue, pink, purple and turquoise).