The deep blue of the lapislazuli was a new color in Ancient Egypt that became associated with water and the divinity of the night sky. The fountain pen ink is made of the highest-quality ingredients for even and consistent ink flow. 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.