This is one Magenta Laser Toner Cartridge for use in HP Color LaserJet 1600, 2600, 2600N Printers. MTI © toner cartridges are engineered to exceed industry standards of high yield and exceptional quality, and guaranteed to perform with HP LaserJet Printers. Every cartridge is engineered in an ISO-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.