The Genuine HP 950/951 B/C Ink Cartridge-Combo-in Box-OEM INK-2017-2019 is a set of four original HP ink cartridges in various colors including cyan, yellow, magenta, and black. These cartridges are compatible with HP printers and use inkjet and thermal print technology for high-quality printing results. The cartridges have an expiration date of 2021-2022 and come with a California Prop 65 warning for buyers in California. This product is ideal for those looking for genuine HP ink cartridges to ensure reliable and consistent performance with their HP printers.