Pilot CON 70 Converter BlackUse Bottled Inks in Your Pilot Fountain Pen Use the Pilot CON converter for bottled ink in your Pilot fountain pen instead of cartridges. Like a syringe, the ink is drawn up through the front, The front part of the converter is inserted into the pen. Then dip the end of the pen with the nib into the ink bottle and pull it up. Multiple mounting increases the capacity.