These printers use the C9429A cartridge:
Click On a Printer to View it's Cartridges
          HP DesignJet 30
          HP DesignJet 30 GP
          HP DesignJet 30 N
          HP DesignJet 30 NR
          HP DesignJet 90
          HP DesignJet 90 N
          HP DesignJet 90 R
          HP DesignJet 130
          HP DesignJet 130 GP
          HP DesignJet 130 NR
          HP DesignJet 130 R