The Pigma Micron Earth Tones by Sakura consist of 6 fineliners with a 0.45 mm tip in the colors sepia, blue-black, royal blue, burgundy, hunter green, and fresh green. The pens contain high-quality pigment ink and are suitable for handwriting, journaling, Zentangle, and more. The different line widths allow you to apply various writing and drawing styles. The ink flows smoothly over the paper, dries quickly, does not smudge, and has a beautiful intense color. For these reasons, the fineliners are often used for technical and artistic illustration. You can use the pens on almost any porous surface. The unique Pigma ink is permanent, waterproof, fade-resistant, and lightfast. Additionally, the ink is pH-neutral and resistant to chemicals. Pigma Micron pens are available in various colors.