The MONO 100 is a Pencil of highest quality. Due to his dark graphite with high density it provides a most intensive contrast. Coated in a fine black varnish. Available in 17 degrees of hardness: 9H - 6H (extreme hard): for special purpose like Litho work, 5H - 3H (very hard): for technical detail drawing, 2H-H (hard): for geometric and technical drawing, HB - H (medium): writing and linear drawing, B - 3B (soft): free-hand-drawing and writing, 4B - 6B (very soft): usage mainly in arts.