These are Premium Gms Compatibles quality replacement cartridges that replace your used HP CF321A toner cartridges. Our Gms Compatibles HP CF321A cyan toner cartridges give you 16,500 pages average at 5% print coverage and are 100% guaranteed to perform with your printer. The Gms Compatibles CF321A toner cartridges replace your original HP Color LaserJet Enterprise Flow MFP M680z, HP Color LaserJet Enterprise MFP M680dn or HP Color LaserJet Enterprise MFP M680f series toner cartridges exactly. Gms Compatibles is a proud USA owned and operated corporation. We combine precision manufacturing with rigorous multi-layer quality control procedures to provide you with an HP CF321A toner cartridge replacement you can rely on. Our Gms Compatibles CF321A cyan toner cartridge replacement is manufactured to the highest standards and all our compatible products come backed with our 1 year warranty.