Pilot Pen Corporation of America Products - Rollerball Gel Pen, Frix, Erasable, Fine, Black Barrel/Ink - Sold as 1 EA - FriXion Ball Erasable Gel Pen allows you to erase and rewrite repeatedly without damaging documents. Thermosensitive gel ink formula disappears with erasing friction of rubber tail plug eraser on the pen. Erasing leaves no residue or debris. Pen can write on the same spot that has been erased. Gel/rollerball pen delivers smooth writing gel ink and is not recommended for signatu