Pigma ink, invented by Sakura over 30 years ago, continues to be the most reliable permanent ink on the market today. Artists, consumers, the government, and scientists consider Pigma Micron a necessary basic tool for any archival-quality, handwritten project. Pigma Micron pens are used in illustration pens, Zentangle, manga comic, calligraphy, card making, coloring, bullet journal, bible journaling, highlighter pen and scrapbooking supplies. This extensive set has 73 pens in different sizes and styles, perfect for any pen enthusiast.Details:Includes assorted styles, sizes and colors73 pen setIncludes pen storage caseArchival quality ink is chemically stable, waterproof, fade resistant, quick dryingInk does not bleed through the thinnest paperWater-based ink No smears, feathers, or bleed-through on most papers Ideal for drawing and sketch pensContents:58 Micron fine line pens9 Brush tip pens6 Graphic bold line pens