The HP LaserJet C3909X (09X) black print cartridge supplies black toner for the HP LaserJet 8000 Printer series. It is identified by the exact C3909X part number, so it is easy to distinguish from the series’ 09A cartridge.
HP declares an average yield of 17,100 standard pages, measured under ISO/IEC 19752 for black-and-white LaserJet printing. This high page yield suits print environments that handle substantial black-and-white output between cartridge changes.