The Kaweco Orange M 6-pack of refills brings solar energy and vibrancy to creative writing projects and note-taking. Includes 6 short, internationally standard ink cartridges with bright, water-soluble, continuous-flow orange pigmentation. They are compatible with all Kaweco Sport, Perkeo, and European universal fitting instruments. The radiant orange hue is ideal for visual diagrams, reading notes, journaling, and highlighting important topics in studies.