Pencil mono 100, hardness grade 2b. The mono 100 is a pencil of the highest quality. Due to its dark, high-density graphite core, it offers an intense contrast. With fine, black lacquer finish. Available in 17 hardness grades: 9h-6h (extremely hard): for special purposes like lithography or cartography, 5h-3h (very hard): for technical detail plans and graphic representations, 2h-h (hard): for geometric and technical drawings, hb-f (medium): for writing and linear drawing, b-3b (soft): for freehand drawing and writing, 4b-6b (very soft): for artistic drawing, sketches, and drafts. Contents: 12 pieces.