This pack contains 3 high-quality ‘Pigma Micron’ fineliner pens in varying widths in a handy, portable wallet. The Micron model of pen is one of the few disposable drawing pens to use archival-standard ink. This permanent, archival-quality ink is waterproof, fade-proof, chemically stable and acid-free. The fineliner nib of these pens gives a smooth, consistent line. - Ink transparency: Opaque - Acid free: Yes - Brand: Sakura - Main materials: Plastic and archival ink - Number of pieces: 3 pens - Permanence: Archival quality permanence - Ink colour: Black - Tip type: Fineliner - Tip size: 0.3mm, 0.4mm, 0.5mm