Faber-Castell Graphite Aquarelle Pencil. Water-soluble pencil perfect for preliminary sketches for watercolour drawings and for complete watercolour techniques and mixed-media projects. Extra break-resistant 3.3mm lead available in 5 hardness grades: HB, 2B, 4B, 6B and 8B. High quality pigments of unsurpassed light-fastness and brilliance. Pigments dissolve completely when brushed with water. Break-resistant due to special bonding process with a smooth colour stroke. Available as individual pencils or in various assorted sets.