Pigment-based waterproof black ink. Plastic brush tips which do not fray. Easy to handle hard tip brush pens. Creates a wide variety of thicknesses by changing the pen pressure. Works best on smooth and non-textured papers. Ideal for lettering, calligraphy, drawing, sketching, manga, doodling illustrations, and presentations. Safe, non-toxic, and UV resistant. comes in – set of 4 Extra-fine/ Fine/ Medium /Bold.