Write smoothly with the category best seller medium-tip FriXion Ball Rollerball Gel Pen. Erase with the FriXion eraser and rewrite over the top immediately. Pilot's best-selling erasable rollerball pen allows you to cleanly write, erase the ink by friction and rewrite - all with the same pen. Simply rub out your mistakes with the eraser stud and watch the ink disappear as if by magic! The unique gel ink responds to the heat generated by the rubbing out, and lets you write ov