Sakura 50038 6-Piece Pigma Micron 05 (0.45mm) Ink Pens, Blister Card, Black;Nib size for precise line width is 0.45-mm;Archival quality ink for use in acid-free environments;Chemically stable, waterproof, fade resistant, no smears, feathers or bleed-through on most papers;Comes with 6 each Pigma Micron 05 (0.45mm) black pens per blister card