This is 4-Pack compatible HP Laserjet M651 (# 652A / 654A) toner cartridges. Includes 1 each CF320A (black), CF331A / CF333A / CF332A (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.