This is a replacement cartridge for the Hewlett Packard C3903A (03A) black laser toner cartridge which is manufactured by LD and is guaranteed to perform with your HP printer. It replaces the original HP C3903A toner cartridge. LD remanufactured replacement C3903A 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 C3903A. Our remanufactured HP 03A 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 C3903A toner cartridges are an economical and sensible alternative to expensive OEM C3903A (HP 03A) 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 C3903A black laser toner cartridges. For use in the following printers: LaserJet 6Pxi, LaserJet 6p, LaserJet 5p, LaserJet 5mp, LaserJet 6mp, LaserJet 6p se. We are the exclusive reseller of LD Products brand of high quality printing supplies on Newegg.