• Pilot CON-40 Piston Converter
• Compatible with Pilot/Namiki Fountain Pens

The Pilot CON 40 Piston Converter offers a simple, reliable way to enjoy bottled fountain pen ink across a wide range of Pilot pens. Its compact, twist-fill design is easy to use and clean, while internal metal agitator balls help keep ink moving for consistent flow.

Design & Function

This twist-operated piston converter draws ink smoothly and securely, with a transparent reservoir that makes it easy to monitor levels at a glance. The internal agitator balls assist with priming and reduce ink cling, supporting steady writing even as the level drops.

Compatibility & Care

Made for Pilots proprietary cartridge and converter system, the CON 40 fits most Pilot and Namiki cartridge/converter fountain pens, including popular everyday models and many Custom series pens. It is not intended for pens with built-in filling systems, such as vacuum-fill or piston-fill bodies. Rinse with cool water between ink changes to maintain clean, reliable performance.

Specifications

• Model: Pilot CON 40 piston converter
• Mechanism: twist piston
• Ink capacity: approximately 0.4 ml
• Compatibility: most Pilot cartridge/converter fountain pens (e.g., Metropolitan, Prera, Kakuno, Explorer, and many Custom series models)
• Not compatible with built-in fillers (e.g., Custom 823 vacuum-fill, Custom Heritage 92 piston-fill)
• Filling method: bottled fountain pen ink