The product is a set of 4 genuine HP color toner cartridges specifically designed for HP printers 4500 and 4550. The cartridges come in cyan, yellow, magenta, and black colors, with model numbers C4191A, C4192A, C4193A, and C4194A respectively. These cartridges are compatible with HP printers using laser print technology, ensuring high-quality color printing. This set provides users with all the necessary toner colors for their printing needs, making it convenient and reliable for producing vibrant and sharp color prints. NOS unopened