This Pigma Micron set from Sakura consists of 2 fineliners 03 is 0.35mm and 05 is 0.45mm and a FREE brush pen. The pens contain high-quality pigment ink and are suitable for hand lettering, journaling, Zentangle and more. The various line thicknesses offer you the opportunity to apply different writing styles and drawing styles. The ink flows smoothly over the paper, dries quickly, does not smudge and has a beautiful deep black color. For these reasons, fineliners are widely used for technical and artistic illustration. You can use the pens on almost any porous surface. The unique Pigma ink is permanent, waterproof, colourfast and lightfast. In addition, the ink is pH neutral and resistant to chemicals.