These are Premium Gms Compatibles quality replacement cartridges that replace your used HP CF400X toner cartridges. Our Gms Compatibles HP CF400X black toner cartridges give you 2,800 pages average at 5% print coverage and are 100% guaranteed to perform with your printer. The Gms Compatibles CF400X toner cartridges replace your original HP Color Laserjet Pro M252dw, HP Color Laserjet Pro M252n, HP Color Laserjet Pro MFP M277dw or HP Color Laserjet Pro MFP M277n 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 CF400X toner cartridge replacement you can rely on. Our Gms Compatibles CF400X black toner cartridge replacement is manufactured to the highest standards and all our compatible products come backed with our 1 year warranty.