These printers use the C9403A cartridge:

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