These are Premium Gms Compatibles quality replacement cartridges that replace your used HP C4127X toner cartridges. Our Gms Compatibles HP C4127X black toner cartridges give you 20,000 pages average at 5% print coverage and are 100% guaranteed to perform with your printer. The Gms Compatibles C4127X toner cartridges replace your original Canon LBP-1760, LBP-52X or HP LaserJet 4000, 4050 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 C4127X toner cartridge replacement you can rely on. Our Gms Compatibles C4127X black toner cartridge replacement is manufactured to the highest standards and all our compatible products come backed with our 1 year warranty.