This set includes 20 fine-line pens in vibrant colors encased in a convenient plastic case. The case folds out into a fun stand-up easel making it easier to choose pens and keep them organized. The .4 mm. fine point pens are formulated to sustain a long cap-off time with non-smudging, water-based ink. The long-wearing tips are encased in metal allowing for hours of use for everything from note-taking to Manga art.