This is a 2-Pack of MTI © PRO 106R584/ 106R00584 Toner Cartridges for the Xerox WorkCentre M15, M15i, FaxCentre F12, WorkCentre Pro 412 and 415 printers. MTI © PRO cartridges are engineered to exceed industry standards of high yield and exceptional performance. With MTI © Pro printing products, enjoy reliable, high-volume printing with outstanding print quality. Every cartridge is engineered in an ISO 9001 certified facility and rigorously tested for quality before shipping. We offer an exclusive 30-day customer satisfaction guarantee and 1-year 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.