This is a new premium compatible Black Toner Cartridge for the Xerox Phaser 6180. It is designed to replace Xerox 113R00726 toner cartridges. MTI © toner cartridges are engineered to exceed industry standards of high yield and exceptional quality, and guaranteed to perform with Xerox Phaser 6180 Printers. Every cartridge is factory tested and ISO approved. We offer an exclusive 30-day customer satisfaction guarantee and extended 1-Year Manufacturer Warranty. Our dedicated customer care staff is available 9 a.m. to 7 p.m, Monday through Saturday, to answer any questions and provide technical support.