This is a replacement cartridge for the Hewlett Packard C9721A 641A cyan laser toner cartridge which is manufactured by LD and is guaranteed to perform with your HP printer. It replaces the original HP C9721A toner cartridge. LD remanufactured replacement C9721A laser toner cartridges are specially engineered to meet the highest standards of quality and reliability you can expect from LD. Our toners have exceptional yields that meet or exceed the OEM Original Equipment Manufacturer page yield for the C9721A. Our remanufactured HP 641A contains up to 85% new parts including wiper blades, OPC drums, an electronic smart chip for accurate toner level readout and other internal components. While most competitors simply refill the toner cartridge and hope the drum and other key components last, we fully disassemble the toner cartridge and rebuild it to ensure the highest quality prints. High quality LD remanufactured C9721A toner cartridges are an economical and sensible alternative to expensive OEM C9721A HP 641A Hewlett Packard laser toner cartridges and supplies. The use of LD remanufactured replacement laser toner cartridges and supplies does not void your printers warranty. LD remanufactured laser cartridges are not remanufactured by HP. LD Products offers a 100% Quality Satisfaction Guarantee on our LD remanufactured C9721A cyan laser toner cartridges. For use in the following printers Color LaserJet 4600dn, Color LaserJet 4650dtn, Color LaserJet 4650dn, Color LaserJet 4650, Color LaserJet 4600, Color LaserJet 4600n, Color LaserJet 4650n, Color LaserJet 4650hdn.