Designed to meet the specific needs of illustrators, cartoonists, and manga artists, to easily create fine lines, shading, textures, and blocking in areas. Archival quality ink chemically stable, waterproof, and fade resistant. No smears, feathers, or bleed-through on most papers. Writes on fine papers like vellum. Graphic pens come in three line-widths of 1mm bullet, 2mm chisel, 3mm chisel. Brush pen is not only a perfect tool for illustrations but also for calligraphy, scrapbooks and decorative projects! Archival quality black Pigma ink has been used by professionals in the Manga industry for over 25 years. These versitile markers are great for all manga and comic illustrations, sketching and writing.