Toner cartridge is engineered specifically for unparalleled performance with the Xerox Phaser 5500. Patented Emulsion Aggregate (EA) toner technology delivers sharper image quality, higher reliability/lower service costs, and faster warm-up time so it's always ready to print. The cartridge monitors toner levels so you'll know precisely when it's time to reorder. Xerox will recycle the used cartridge free of charge through its Green World Alliance supplies recycling program. Cartridge yields approximately 30,000 pages.