Ohto 0.7mm Black Oil-based Ink Refill (No.897NP), for Ohto Needle Point Ballpoint Pen, &times; 6 Packs/total 6 pcs (Japan Import) [Komainu-Dou Original Package] Refill for Ohto Needle Point Ballpoint Pen (NBP-350C/NBP-380C/NBP-505C/NBP-507C/NBP-507R/NBP-505G/NBP-507G/NBP-5A5/NBP-6A5/NBP-7KB5/NBP-350B/NBP-350P), and OHTO Needle Point Knock Ballpoint Pen Horizon (NBP-587H) Pen tip diameter: 0.7mm Line width: 0.35mm Ink color: Black Low viscosity Oil-based Ink