The MSE HP C4127X / 27X HP 4000 High Yield Toner is a black toner cartridge designed for use with HP printers. With a page yield of up to 15,000 pages, this high yield toner is specifically compatible with models such as HP 4000, HP 4050, and HP 27X. It utilizes laser print technology for crisp and clear black prints, making it an ideal choice for high-volume printing environments. The MES brand ensures quality and reliability in delivering consistent and professional results.