For the best results and reliability from your Phaser 6600 printer, make sure you use only a genuine Xerox Black Toner Cartridge. This high capacity cartridge is packed with extra toner, giving you up to 8,000 pages from a single cartridge with improved economy and lower cost per page. Xerox engineering and specially formulated toner ensures bright colours and unbeatable sharpness. This cartridge can print up to 8,000 pages.