I am adding converter beads as an extension to the vial program. Just as with the vial program, I don't expect to make money off this (strictly not for profit), so the rules are the same.
5¢ for a converter bead
10¢ for a vial
As with the ink exchange vials, there is $1 Paypal fee since this is all at cost (waived if you buy other stuff from my shop or if you send check or money order), and a $1 handling fee (also waived if you buy other stuff from my shop)
These beads, like the vials, I purchase by the truckload (figuratively, but I buy in bulk), and I distribute them as a service to FPN members.

These beads are sold loose and are made of fiberoptic glass. They are 4mm in diameter. To install them, unscrew the metal ferrule on the body of the converter, pull the mechanisim out making note of the mechanism alignment notches (if any) and drop a single bead in. Then reassemble the converter. These beads keep ink from sticking to the sides of the converter by rolling around a breaking the tension of the ink.
Dillon
These underwent a testing process, and no one has reported any problems.