This is one full color set of MTI © Compatible Laser Toner Cartridges (Black, Yellow, Cyan, Magenta) for use in Ricoh Aficio SP C811DN Printers. MTI © compatible toner cartridges are engineered to exceed industry standards of high yield and exceptional quality, and guaranteed to perform with Ricoh Printers. Every cartridge is engineered in an ISO 9001 certified facility and factory tested before shipping. We offer an exclusive 30-day customer satisfaction guarantee and 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.