This is 4-Pack compatible Samsung CLP-365W toner cartridges. Includes 1 each CLT-K406S (black), CLT-C406S / CLT-M406S / CLT-Y406S (cyan / magenta / 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 money, but also provide a high quality product to ensure long term customer satisfaction.