An extra fine flex replacement nib unit for the cartridge/converter versions of the Esterbrook Estie, Model J and Niblet.
- Extra Fine Flex nib
- Stainless Steel Gold Plated
- Standard cartridge/converter housing
- Does not fit a button-piston pen with this housing
Representative Fine Flex nib unit shown. The selected Extra Fine Flex grade will be supplied; the tip and grade marking differ.