Pilot Pen-FriXion Ball Color Sticks Erasable Gel Pen. These pens allow you to erase and rewrite repeatedly without damaging documents. The thermo-sensitive gel ink formula disappears with the erasing friction of a rubber tail plug eraser on the pen. Erasing leaves no residue or debris. This package contains twelve 0.7mm gel pens. Comes in a variety of colors. Each sold separately. Imported.