Remanufactured Replacement Laser Toner Cartridge for Hewlett Packard C4127X (HP 27X) Black THIS CT4127X IS A PROFESSIONALLY MANUFACTURED COMPATIBLE TONER THAT REPLACES THE ORIGINAL HP #27X (C4127X) BLACK TONER CARTRIDGE. THIS CARTRIDGE WAS ENGINEERED IN A MANUFACTURING FACILITY THAT USES STATE OF THE ART PROCESSES TO INSURE THAT THIS CARTRIDGE WILL PRINT AS WELL AS THE Works with the following models: Hewlett Packard Laserjet 4000, Hewlett Packard Laserjet 4000n Hewlett Packard Laserjet 4000se, Hewlett Packard Laserjet 4000t, Hewlett Packard Laserjet 4000tn