Mitsubishi Pencil UMN30738.33 Gel Ballpoint Pen Uni-Ball Signo 307 0.38 Blue 10
・Series: Signo 307. Quantity: 10 pieces in a box. Refill for UMR-83E.33. New ink formulated with the next generation material cellulose nano fiber. Cellulose Nano Fiber has been made the world's first practicality.