Pilot Pen-FriXion Ball Color Sticks Erasable Gel Pens: Assorted Colors. 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 8-1/4x5- 3/4x3/4 inch package contains ten 0.7mm gel pens in assorted colors. Imported.