Drawing and inking set features Pigma Micron, Graphic and Brush pens. Ideal for artists and professionals. Pigma ink is permanent, archival-quality, waterproof, chemical-resistant and fade-resistant when dry. Three Micron pens include 0.25mm, 0.35mm, and 0.5mm. Use 1.0mm Graphic ink pen for fine lines, shading, textures and coloring in images. Graphic ink pen writes on fine papers such as vellum. The Brush pen is a flexible brush-tipped pen designed for creating swirls, doodles, fine lines and broad brush strokes. Six-piece kit also includes Sakura 127 mechanical pencil with a 0.7mm point. Nontoxic.