This is the ink cartridges that we put in our clicker pens when we build them. There are other options out there that will work in our pens, but if you want what came with it this is it.
Our OEM Schmidt cartridge, Schmidt EasyFlow 9000M. Available in black or blue.
Our OEM Pilot G2 Mini cartridge, available in black.
Our OEM Pilot G2 Full Size cartridge, available in .5mm & .7mm, both in black.