The 6-pack of Kaweco M red fountain pen refills delivers an intense and vibrant scarlet color for revisions and expressive handwriting. The package contains 6 short universal cartridges with quick-drying liquid ink and consistent flow that keeps the nib unimpeded. Compatible with Kaweco fountain pens and other internationally standardized models, they are extremely easy to carry in a wallet. The striking contrast of the pure red color is indispensable for teachers, editors, and students to make sharp corrections and highlights.