Install a Xerox Black High Capacity Toner Cartridge (106R01535) in your Phaser printer for exceptionally long-lasting print quality. When you see Toner Low or Toner Empty error messages on your Phaser 4600 or 4620, it's time to replace the old toner cartridge. Keep a new one to hand for easy Compatible when necessary. This exceptional high capacity toner cartridge works tirelessly with your Xerox printer, yielding up to 30,000 pages.