4C Refill

The standard D1 size refill, so it fits the Bullet Ballpoint Pen and most other multi pens and slim ballpoints you already own. Black ink.

Two nib sizes. The 0.5mm needle tip is the one to get if you write small or annotate in margins.

• Black ink
• 0.5 mm needle tip or 0.7 mm
• D1 standard size