Tombow Mono Fineliner Drawing Pen 01 Tip 0.24mm Line Black (Pack 12) The fineliner MONO drawing pen is suitable for technical drawings, illustrations, outlines, comics, Manga, sketch notes, doodling, urban sketching and much more. Available with three different line width: 01 (approx 0.24 mm), 03 (ca. 0.35 mm) and 05 (ca. 0.46 mm). Due to the long metal nib the fineliner is convenient for utilizing templates and rulers. Pigment- and waterbased ink. Color: black.