The fudenosuke brush pen is suitable with its elastic brush tip for calligraphy, sketches, sketchnotes, doodling, hand lettering, and much more. The line width varies from very fine to thick depending on the pressure applied to the tip, with a soft tip particularly suitable for large scripts. The ink is water-based with color pigments and odorless. Writing color: black. Length (mm): 140 Width (mm): 15 Height (mm): 15