Zebra 1.0mm Blue Black Ink Refill (JF-1.0), for Zebra Sarasa Clip 1.0 Gel Ballpoint Pen(JJE15-FB), &times; 5 Pack/total 5 pcs (Japan Import) [Komainu-Dou Original Package] Refill for Zebra Sarasa clip 1.0 gel ballpoint pen (JJE15-FB) Ink color: Blue Black The diameter of a ball: 1.0 mm. Broad type.