Uni-ball SXR7.24 Jetstream Ballpoint Pen Refill Black Ink, 0.7 mm, &times; 6 Pack/total 6 pcs (Japan Import) [Komainu-Dou Original Package] Refill for Jetstream Ballpoint Pen (SXN-150-07, SXN-250-07, SXN-2200-07, SXN-150C-07, SXN-1000-07) Super-smooth ink Ball diameter: 0.7mm Ink color: Black