Japanese pencil manufacturer Eye Ball's calligraphy pencil (or kouhitsu shosha) incorporates graphite so soft and dark that students in Japan use it to practice their lettering. The extra-wide 6B lead sharpens to a fine, strong point, allowing seamless transitions between thick and thin lines. combining the variability of a brush pen with the erasability and ease of use of a pencil. Japanese charachters are imprinted in electric blue on the irridescent purple lacquered barrel. 

Single unsharpened pencil
6B graphite
7"