Xerox Phaser™ 6600, WorkCentre™ 6605 Yellow Toner Cartridge was specially designed and tested for our products. It ensures optimal print quality and the highest reliability during the printing process. You can count on it, page after page. Genuine Xerox supplies and Xerox equipment are made for each other. Don't accept imitations. Compatible toners may cause Xerox printers to malfunction and lead to poor print quality and weak colors. With over 75 years of experience, genuine Xerox toner cartridges are something you can rely on.