Upper Reservoir Unit for Nib Sections

A matching nib section + upper reservoir unit. It transforms your Rubato fountain pen into a flex fountain pen.

Please order together with your purchase of fountain pen for the correct size-fitting.
Each option includes:
- G nib, upper reservoir, feeder, nib section, ink cartridge.

All nib sections are handmade, mix-and-match and one of a kind— some are shimmery, some contain metallic flakes.
Contact us for specific color orders.

Handmade in CA, USA.