Box of 12 Uni-ball Vision Elite 61231, Black Ink, 0.8mm Bold Point Rollerball Pens. 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. Refillable with black Uni-ball refill No. U1A61233PP