Highlighter and fountain pen: the unique thing about the new M 205 DUO piston fountain pen is the idea of equipping a fountain pen with the additional function of a text marker. This writing instrument features a transparent housing in neon-yellow, which lets you see its inner workings. Schoolbooks and manuscripts, worksheets or presentations: wherever paper is put to use, the little helper with the fluorescent effect is sure to be close at hand – not only to mark important text passages but also to insert comments and additions.