The Xerox Phaser 5500 toner cartridge, engineered specifically for unparalleled performance with the Phaser 5500 printer, yields an average of 30, 000 pages at 5% area coverage. This Phaser 5500 toner cartridge uses patented Emulsion Aggregate (EA) toner technology for sharper image quality, higher reliability/lower service costs, & 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 the Green World Alliance supplies recycling program.