This is 4-Pack compatible HP LaserJet Pro M252, MFP M277 toner cartridges. Includes 1 each CF400X (black), CF401X (cyan), CF403X (magenta), CF402X (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.