Pilot CON-50 Piston Converter
Piston-style twist converter. Fits all current Pilot and Namiki pens, except the older style Namiki
Vanishing Point (faceted plastic body), any earlier Pilot Capless pens, the Pilot E95S, or the MR as sold in Europe. A small metal agitator inside the barrel helps break up air bubbles to keep a steady flow of ink.