Rollerball pen offers premium liquid ink and a black barrel with a strong metal clip. Uni Super Ink is specially formulated to become trapped in paper, helping prevent criminal check washing and other document alteration. Quick-drying ink prevents smudging. Archival-quality, acid-free ink is perfect for documenting and record-keeping. Ink color is indicated by tip and dot on cap. Use clip to attach rollerball pen to pockets, notebooks and more.