Signo Gel 207 Roller Ball Retractable Gel Pen, Blue Ink, Micro Fine, Dozen, Sold as 2 Dozen Retractable roller ball gel pen with visible ink supply and pocket clip features a conical tip plus a textured grip. uni-Super Ink? specially formulated to become trapped in paper, helping prevent criminal check washing and other document alteration. Textured grip provides superior writing comfort and control. Stylish metallic accents with a high quality finish. Archival quality and acid-free ink for documenting and recordkeeping.