Refresh your writing experience with the genuine OHTO C-307-BK refill, featuring black water-based ink and a 0.7 mm ceramic ball. The ceramic ball provides smooth rolling and consistent ink flow for comfortable, effortless writing.

OHTO’s patented Non-Dry mechanism helps limit direct air contact with the ink system, reducing the risk of the tip drying out when the pen is left uncapped.

• Type: Ceramic roller refill
• Model: C-307-BK
• Ink color: Black
• Ink type: Water-based
• Ball diameter: 0.7 mm
• Ball material: SiC ceramic
• Dimensions: 111 ? O6.2 mm
• Barrel material: Stainless steel
• Packaging: 1 piece
• Country of manufacture: Japan
• Barcode: 4971516292806