Original colour imaging drum units (like the Xerox 108R00861) deliver and distribute toner powder from your toner cartridge wherever it needs to be within your printer. Thankfully Xerox have made this genuine Xerox 108R00861 image drum incredibly hard wearing and estimate that it will help you produce 80,000 prints from this single unit.Compatible with several quality Xerox laser printers including the Phaser 7500N, this original 108R00861 is an essential purchase.