The Ohto Refill No. 175NP is a .5mm ballpoint refill compatible with the Mark’s Inc. Tous Les Jours Pen, HiBi Wooden Ballpoint Pens, Mark’s Inc. Wooden Cat Pens, Mark’s Inc. Flourishing Days Pen, and Mark’s Inc. Wooden Wolf Pens.

• Total Length: 98.5mm
• Shaft Diameter 3mm
• Tip Size: .5mm
• Line Width: .22mm