The Copic Multiliner Pens are a favourite amoung watercolourists, architects, designers, illustrators, and sketch artists. These high quality Copic pens can create fine lines and detail that are unmatched in any other brand. Their pigment based ink is waterproof and won’t bleed or smear when used with Copic Markers, or painted over with watercolour paints or inks. Pigment based ink is waterproof once dry Won’t bleed or smear when used with Copic Markers. Ideal for Watercolour Pen & Wash sketching Black multiliners are available in 0.03, 0.05, 0.1, 0.3, 0.5, 0.8, 1.0mm Brush Small (BS) and Brush Medium (BM). Calligraphy Small (CS) and Calligraphy Medium (CM)