Tombow Dual Brush Pens have two tips: one fineliner for technical work and outlines, and one larger brush tip, which is springy and allows for a wide range of naturalistic stroke sizes. The water-based ink is odorless, non-toxic, blends easily, and won't bleed through most papers. Tombows are perfect for fine art projects, journaling, design, coloring books, lettering, manga, and craft projects. Try using the Secondary set for nature illustration. Includes colors 885, 933, 993, 158, 177, 603, 679, 992, 977, and a clear N00 blender (pictured left to right).