Signo Gel 207 Retractable Roller Ball Pen, Medium Point, Black Ink, Pack of 12. Smooth rubber grip offers supreme comfort for effortless and controlled writing. Uni Super ink is specially formulated to become trapped in paper, helping prevent criminal check washing and other document alteration. Sleek, stylish design with metallic accents and stainless steel tip. Provides a smooth writing experience similar to a roller ball pen with the durability of a ballpoint pen.