The product is a set of 4 genuine HP 128A toner cartridges, specifically the CE321A (cyan), CE322A (yellow), CE323A (magenta), and CE320A (black). These cartridges are designed for use with HP LaserJet printers and are compatible with HP printers, offering high-quality, original toner for reliable printing. The set includes all four colors needed for full-color printing, providing convenience and cost-effectiveness for users who require consistent and professional print results.