The product is a lot of 3 genuine HP 57 tri-color ink cartridges that are expired as of 2007. These cartridges are specifically designed for use with HP printers, featuring cyan, yellow, and magenta colors. With a print technology of inkjet and thermal, they are compatible with a variety of HP models, including C6657AN. These single units are ideal for those looking to replenish their printer ink supply with high-quality, reliable cartridges from a trusted brand like HP.