This set includes four remanufactured toner cartridges for the HP 503A series, featuring black, cyan, magenta, and yellow colors. Each cartridge has a standard yield and is designed to deliver up to 12,000 pages combined. Our remanufactured cartridges are fully disassembled and rebuilt to ensure reliable performance and high-quality prints. Using these remanufactured cartridges will not void your printer's warranty and they are backed by a 2-year guarantee.