Keep your OHTO CR01 Ceramic Rollerball Pen writing like new with the C305 Ceramic Roller Gel Pen Refill. The non-dry mechanism helps prevent the nib from drying out, while the ceramic roller ball absorbs ink smoothly and resists deformation and rust for long-term, consistent flow.
Filled with water-based gel ink and a precise 0.5 mm point, this refill delivers clean, reliable lines for journaling, notes, work, and planning.