Uni-ball Uniball Vision Elite 69021, Blue Ink 0.5mm Micro Point Rollerball Pen. Uni ball Vision Elite Rollerball Pen is ideal for business travelers because the pen has a patented airplane-safe, leak-free ink device. Special formulated uni Super Ink becomes trapped in paper, helping to protect against water, fading and document fraud. Uncapped pen displays ink supply. Use the archival-quality, acid-free ink for valued documents.