Uni Ball Signo Impact 207 RT 65870 Black Gel Ink, 1mm Bold Point Rollerball Pen delivers an ultra-smooth ink flow from a 1mm tip. Uni Super Ink prevents check and document fraud. Innovative auto-retractable tip withdraws into the barrel as you clip the pen to any surface. Ink is acid-free, fade-resistant and water-resistant. Contemporary barrel design features an extra-control rubber grip for comfort and control in writing.