Yozakura, document-proof Color tone inspired by the Japanese cherry blossom Color inspired by nature Proprietary formulation based on the highest quality dyes High color brilliance and flowability 6 standard ink cartridges, 0.86 ml each Pack of 6 Graf von Faber-Castell ink cartridges in the standard international short format. Suitable for use in all fountain pens that use the international cartridge format, but especially for Graf von Faber-Castell pens.