UL-S-0.4-30HB ULS0430HB Mitsubishi 4902778274019 (10 sets)

Core diameter: 0.4mm
Even though it's clear and dark, it doesn't get smeared even if you rub it, and the letters don't smudge even when you draw a marker. A sharp refill that is hard to break, dark, smooth, and stain-resistant.
◆Hardness: HB ◆Quantity: 30 pieces