The HP Inc. 31 Smart Tank Bottles CMY 3-Pack is a high-yield printer combo pack designed for use with HP printers. This genuine/original ink refill includes cyan, yellow, and magenta color bottles, as well as black ink for printing in color. The bottles are compatible with the HP 31 model and are sourced from Malaysia, ensuring quality and reliability in your printing needs. With a unit quantity of 1, this combo pack offers long-lasting and efficient ink usage for your printing requirements.