This is one full color set of MTI © PRO Compatible Laser Toner Cartridges (Black, Yellow, Cyan, Magenta) for use in Lexmark C720 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 before shipping. We offer an exclusive 30-day customer satisfaction guarantee and 2-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.