Our innovative refillable rollerball nib takes a “Standard International” ink converter or ink cartridge, and therefore can be refilled in just the same way as a fountain pen.
Available with a black or chromed finish, they have a 6.5 x 0.5mm thread and are ideal for makers of kitless pens or custom pens.
We also have corresponding 6.5 x 0.5 thread taps available.