These printers use the C4943A cartridge:
Click On a Printer to View it's Cartridges
          HP DesignJet 5000 (42 & 60" UV INK ONLY)
          HP DesignJet 5000 PS (42 & 60" UV INK ONLY)
          HP DesignJet 5000 PS UV (42 & 60" UV INK ONLY)
          HP DesignJet 5000 UV (42 & 60" UV INK ONLY)
          HP DesignJet 5500 (42 & 60" UV INK ONLY)
          HP DesignJet 5500 PS (42 & 60" UV INK ONLY)
          HP DesignJet 5500 PS UV (42 & 60" UV INK ONLY)
          HP DesignJet 5500 UV (42 & 60" UV INK ONLY)