Inside Liberum Volucris: Materials, Nib Units and Care
Published · 2 min read (estimated)
The practical details of a fountain pen are its body material, filling system and replaceable components. For Liberum Volucris, those details can be checked against the catalogue: a titanium or brass body, vacuum filling for bottled fountain pen ink, and a threaded #6 stainless steel nib unit.
What the Volucris catalogue establishes
The titanium pen is approximately 41.5 g in total and 28.4 g uncapped. The brass pen is approximately 66 g in total and 42 g uncapped. Both are approximately 120 mm capped and use vacuum filling. They do not use a removable international cartridge converter as their main filling system.
Understand the nib unit before replacing it
The standard installed unit uses a #6 stainless steel nib and a plastic feed. Liberum has confirmed the threaded housing's compatibility with JoWo #6 nib units through assembly testing. The word compatible does not mean that every brand's #6 component can be substituted safely.
If you order the extra ebonite-feed unit with a pen, you receive one separate extra unit alongside the standard installed one. The independent nib-unit listing is for one unit, with no pen included. Select the actual width you want and check the configuration on the product page.
Care and service questions
Use ink intended for fountain pens and follow the model's instructions. If a part resists removal or you are unsure which replacement fits, contact Liberum before applying force. Spare-part availability and repair arrangements should be confirmed for the specific model rather than assumed for every product in the store.
Read the pocket pen buying guide, the 120 mm size guide, or compare Volucris vacuum fillers for more practical selection information.
About this guide: Published by Liberum, the seller of Volucris pens. AI tools assisted with drafting. Product facts are based on the linked catalogue and brand confirmations; this is not an independent hands-on review or a laboratory test. Photographs are supplied by the brand. Checked on 2 November 2026; specifications and available configurations can change.