Mitsubishi UL-S-0.5-404B ULS05404B 4902778274095 (10 sets)

Core diameter: 0.5mm Although it is clear and dark, it does not stain easily even when rubbed, and the letters do not smudge even when drawn with a marker. A sharp refill that is hard to break, dark, smooth, and stain-resistant. ◆Hardness: 4B ◆Quantity: 40 pieces