The MONO 100 is a very high quality pencil. Thanks to its high-density dark graphite, it offers the most intense contrast. It is covered with a thin black varnish. Available in 17 degrees of hardness: 9H - 6H (extremely hard): for special work such as lithography / 5H - 3H (very hard): for technical drawing / 2H-H (hard): for geometric and technical drawing / HB - H (medium): for writing and line drawing / B - 3B (soft): for freehand drawing and writing / 4B - 6B (very soft): for use mainly in the arts.