The HP LaserJet C3909X Black Print Cartridge is ideal for the high-volume business user who is looking for a lower cost per page. It has been designed together to work together with the HP LaserJet 5si, 5si MX, 5si Mopier and the HP LaserJet 8000 Printer series. The higher-capacity, long-lasting cartridges reduces orders, empties, and the frequency of cartridge changes. Average cartridge yields 17,100 standard pages. Declared yield value in acordance with ISO/IEC 191752.