This is a replacement cartridge for the Hewlett Packard C3909A MICR (09A) black laser toner cartridge which is manufactured by LD and is guaranteed to perform with your HP printer. It replaces the original HP C3909A toner cartridge. LD remanufactured replacement C3909A laser toner cartridges are specially engineered to meet the highest standards of quality and reliability you can expect from LD. They are specifically designed for printing checks, made possible by a special iron in the toner that is detectable at banks. Our toners have exceptional yields that meet or exceed the OEM (Original Equipment Manufacturer) page yield for the C3909A. Our remanufactured HP 09A contains up to 85% new parts including wiper blades, OPC drums, 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 C3909A toner cartridges are an economical and sensible alternative to expensive OEM C3909A (HP 09A) 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 two year 100% Quality Satisfaction Guarantee on our LD remanufactured C3909A black laser toner cartridges. For use in the following printers: LaserJet 5si, 8000n, 5si mx, 8000, 8000dn, 8000mfp, 5si mopier, 5si nx Mopier 240. We are the exclusive reseller of LD Products brand of high quality printing supplies on Newegg.