Sakura Pigma Micron pen 03 Black ink marker felt tip pen, Archival pigment ink pens for artist, zentangle, technical drawing pens - 8 pack of Micron 03 Black Package includes : Sakura Micron 03 Black - 8 pack set (Manufacturer box not included) Nib size for precise line width is 0.35-mm Used in illustration pens, calligraphy, Card making, technical drawings, bullet journal and scrapbooking supplies Archival quality ink for use in acid-free environments. Water-based & quick drying on porous surfaces Chemically resistance, waterproof, fade resistant, no smears, feathers or bleed-through on most papers