Pentel's Hybrid Technica Pen contains a smooth, pigmented ink and a long-lasting ball delivery system. The acid-free, archival safe ink is perfect for sketching, drawing, manga, and much more. The ink is lightfast, bleedproof, waterproof and fade-resistant. Its tungsten carbide roller tip delivers a consistent line from the first to last drop of ink. Black ink only. Nonrefillable. Four width sizes available: 0.3mm, 0.4mm, 0.5mm, and 0.6mm.