Pilot Frixion Ball Stick Rollerball Pens 0.7mm Tip Assorted (Pack 6) - 5012052061965Write smoothly with the fine tip FriXion Ball, erase with the FriXion eraser and rewrite immediately. Pilot's best selling rollerball 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 over your mistake immediately with the same pen.