Uni-Ball 69034 Gel Retractable Pen, Micro Point, Black Ink, 12-Count Combines the performance of a ballpoint with the glide of a roller ball for a superb writing experience. Uni Super ink is specially formulated to become trapped in paper, helping prevent criminal check washing and other document alteration. Acid-free gel ink is perfect for those important documents that need to withstand the test of time. Visible ink supply so you know before you run out. Retractable tip for added convenience.