This is 4-Pack remanufactured Dell E525w toner cartridges. Includes 1 each 593-BBJX (black), 593-BBJU (cyan), 593-BBJV (magenta), 593-BBJW (yellow). Each toner cartridge is manufactured to be comparative to the original in terms of quality and page yield. Extensive testing and R&D have enabled us to produce cartridges that will not only save you monebut also provide a high quality product to ensure long term customer satisfaction.