STABILO CarbOthello is a chalk pastel coloring pencil available in 60 colors. With its wonderfully dry and dusty stroke it is just like a chalk pastel in pencil format. It's very popular with artists, art students, and people with creative hobbies. Its high pigmentation guarantees great luminosity and opacity as well as color fastness and color brilliance especially on dark backgrounds and delicate papers. It can also be sharpened to a very fine tip which makes it ideal for detail. Colors can be dry mixed and blended to make coloring more fun and special.The lead diameter is 4.4mm, the colors are partially water soluble which means the contours remain visible and the wood encased barrel protects the lead from breaking.