This set includes four compatible toner cartridges for the HP 131A/131X series: black (CF210X), cyan (CF211A), magenta (CF213A), and yellow (CF212A). Each cartridge is designed to deliver high-quality print results and reliable performance with your HP printer. Using these compatible cartridges will not void your printer's warranty, providing a cost-effective printing solution. Backed by our 100% Satisfaction Guarantee, these cartridges ensure dependable output for your home or office needs.