These printers use the C9373A cartridge:
Click On a Printer to View it's Cartridges

          HP DesignJet T-610 (24-44 IN)
          HP DesignJet T-620
          HP DesignJet T-620 Wideformat
          HP DesignJet T-770
          HP DesignJet T-770 Wideformat
          HP DesignJet T-790
          HP DesignJet T-790 EPrinter
          HP DesignJet T-790 POSTSCRIPT EPrinter
          HP DesignJet T-795 EPrinter 44IN
          HP DesignJet T-1100 (24-44 IN)
          HP DesignJet T-1100 PS (24-44 IN)
          HP DesignJet T-1120
          HP DesignJet T-1120 HD
          HP DesignJet T-1120 HD Wideformat
          HP DesignJet T-1120 PS (24-44 IN)
          HP DesignJet T-1120 SD
          HP DesignJet T-1120 SD MFP
          HP DesignJet T-1200
          HP DesignJet T-1200 HD 44 IN
          HP DesignJet T-1200 Wideformat
          HP DesignJet T-1300
          HP DesignJet T-1300 EPrinter
          HP DesignJet T-1300 POSTSCRIPT EPrinter 44IN
          HP DesignJet T-2300
          HP DesignJet T-2300 EMFR
          HP DesignJet T-2300 POSTSCRIPT EMFR
          HP DesignJet SD PRO