This set includes four remanufactured toner cartridges for the HP 121A series, featuring black, cyan, magenta, and yellow colors. Each cartridge is designed to deliver a total yield of up to 9,000 pages, ensuring reliable performance for your HP printer. Our remanufactured cartridges are fully disassembled and rebuilt using both OEM and non-OEM parts to guarantee high-quality prints. Using these remanufactured cartridges will not void your printer's warranty and they are backed by a 2-year guarantee.