Pilot CON-70 Push Button Fountain Pen Converter – Black

This converter is is known as a push-button. Pushing the button creates something like a vacuum inside the converter, pulling ink in from the open end. It is best filled while while immersing the nib section in an ink jar and pressing and releasing the button quickly.  It holds about 1.1ml of ink.
 
This converter is compatible with the following Pilot pens (and maybe a few others): Custom 74, Metal Falcon, Justus 95, and (surprisingly) the Explorer and Kakuno.
 
Color: Black