Extra high-capacity toner cartridge is specially formulated and tested to provide the best quality and most reliable printing you can count on page after page. It is designed for use in Xerox WorkCentre 6515 and Phaser 6510. Xerox Genuine Supplies and Xerox equipment are made for each other. The higher yield makes this cartridge perfect for high-volume printing. Cartridge yields approximately 4,300 pages.