4.0 What are the parts of a fountain pen?
The pen has several components which make up two main systems: the body, and
the ink path. The body usually consists of the barrel, the section (the thing
that the nib is mounted on/in), and the cap. The ink path consists of the ink
reservoir and filling mechanism, the feed (the non-metallic thing the nib seems
to be sitting on), and the nib itself.