This CM991A Contains: 1 x matte black ink cartridge - 400ml Designed for cost-effective, high quality monochrome printing, the HP 761 matte Black ink cartridge enables crisp, clear, defined print quality which is both cost-effective and professional. With 400ml of ink available to print with, the HP 761 matte Black ink cartridge provides a combination of both quality and quantity to give you longer lasting, impressive looking printing. Printing with the HP CM991A enables fast drying, smudge resistant printing which is both consistent and resilient in its performance.