Black ink cartridge (Up to 450 A4 pages) Approx. cartridge yield is declared in accordance with ISO/IEC 24711. Brother original supplies maintain top quality results & offer great value for money. Brother employ precision engineering in the development of ink. These inks are specially designed to give you high quality results from your Brother printing technology every time. Brother original supplies produce images that are true to life every time. Brother's colour matching process is designed to work with Brother's own ink formula. Low cost individual cartridges just replace the empty colour cartridge reducing wastage and cost.