These printers use the 51644Y cartridge:
Click On a Printer to View it's Cartridges

          HP DesignJet 350 C
          HP DesignJet 350 C D-Size
          HP DesignJet 350 C E-Size
          HP DesignJet 450 C
          HP DesignJet 455 C
          HP DesignJet 455 CA
          HP DesignJet 488 C
          HP DesignJet 488 CA (24inch)
          HP DesignJet 488 CA (36inch)
          HP DesignJet 488 CA Wide Format
          HP DesignJet 750
          HP DesignJet 750 C
          HP DesignJet 750 C Plus
          HP DesignJet 750 C Plus D
          HP DesignJet 750 C Plus E
          HP DesignJet 755 CM
          HP DesignJet 755 CM Plus
          HP DesignJet 2500 CA
          Kodak Digital Science PSA 1000