. 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..