Tungsten carbide roller tip guarantees a smooth consistent line from the first drop of ink to the last. Pigmented ink is light-fast bleed-proof waterproof and fade-resistant. Acid-free and archival safe ink is perfect for sketching drawing manga illustrations and much more. Black ink. 5-piece set includes one each of five sizes: 0.3mm 0.4mm 0.5mm 0.6mm and 0.8mm.