With an even longer life than its Xerox toner cartridge counterpart, this genuine 013R00657 black drum cartridge offers exceptional value. The Xerox 13R00657 drum unit takes toner powder from the cartridge and helps apply it to paper for fusing. Your Xerox printer simply cannot operate without the 13R657 drum unit and is just as important as a good set of toners. This brand new Xerox 013R00657 drum cartridge is compatible with the Xerox WorkCentre 7125 and all of the other printers listed on this page.