These printers use the CB435X cartridge:
Click On a Printer to View it's Cartridges
          HP LaserJet P-1000 Series
          HP LaserJet P-1002
          HP LaserJet P-1003
          HP LaserJet P-1004
          HP LaserJet P-1005
          HP LaserJet P-1005 N
          HP LaserJet P-1006
          HP LaserJet P-1006 N
          HP LaserJet P-1009