Sanford uni-ball roller rollerball pen, 0.5mm, green ink, dozen 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. Ink color is indicated by tip and dot on cap. Use clip to attach rollerball pen to pockets, notebooks and more. Quick-drying ink/smudge proof/metal pocket clip. larger quantity quotes available. Please call 1-888-978-7759. this product arrives to most customers in 2-3 business days.