HP Cartridge C4912A is compatible in the following HP Models:

HP DesignJet T770 Printer series

HP DESIGNJET T770 24-IN PRINTER - CQ305A
HP DESIGNJET T770 24-IN PRINTER WITH HARD DISK - CQ306A
HP DESIGNJET T770 44-IN PRINTER - CH539A
HP DESIGNJET T770 44-IN PRINTER WITH HARD DISK - CN375A

HP DesignJet T620 Printer series

HP DESIGNJET T620 24-IN PRINTER - CK835A

HP DesignJet T1200 Printer series

HP DESIGNJET T1200 44-IN POSTSCRIPT VERSION PRINTER - CK834A
HP DESIGNJET T1200 44-IN PRINTER - CH538A

HP DesignJet Copier series

HP DESIGNJET CC800PS COPIER - Q1262A

HP DesignJet 820 MFP series

HP DESIGNJET 820 MFP - Q6685A

HP DesignJet 815mfp series

HP DESIGNJET 815MFP - Q1279A
HP DESIGNJET 815MFP REMARKETED - Q1279AR

HP DesignJet 510 Printer series

HP DESIGNJET 510 24-IN PRINTER - CH336A
HP DESIGNJET 510 42-IN PRINTER - CH337A
HP DESIGNJET 510PS 24-IN PRINTER - CJ996A
HP DESIGNJET 510PS 42-IN PRINTER - CJ997A

HP DesignJet 120 Printer series

HP DESIGNJET 120 PRINTER - C7791A
HP DESIGNJET 120 REMARKETED PRINTER - C7791AR
HP DESIGNJET 120NR PRINTER - C7791B
HP DESIGNJET 120NR REMARKETED PRINTER - C7791BR

HP DesignJet 110plus Printer series

HP DESIGNJET 110PLUS NR PRINTER - C7796E
HP DESIGNJET 110PLUS PRINTER - C7796D

HP DesignJet 110 Color Printer

HP DESIGNJET 110 COLOR PRINTER - C7796B

HP DesignJet 100plus Printer series

HP DESIGNJET 100PLUS PRINTER - C7796C
HP DESIGNJET 100PLUS REMARKETED PRINTER - C7796CR

HP DesignJet 100 Printer series

HP DESIGNJET 100 PRINTER - C7796A
HP DESIGNJET 100 REMARKETED PRINTER - C7796AR