Pilot FriXion Ball Knock Retractable Erasable Gel Ink Pens,Fine Point, - 0.5mm - Black Ink- Value set of 3 & 3 Gel Ink Pen Refill Pack Combines the convenience of a retractable with the incredible FriXion erasable gel ink Erase and rewrite repeatedly without damaging documents - Eraser is at the top of the pen, tip is retractable by pressing clip down Unique Thermo-Sensitive gel ink formula disappears with erasing friction