These printers use the C6615 cartridge:

HP Color Copier 310

HP DeskJet 810 C

HP DeskJet 812 C

HP DeskJet 816 C

HP DeskJet 825 C

HP DeskJet 825 CVR

HP DeskJet 840 C

HP DeskJet 841 C

HP DeskJet 842 C

HP DeskJet 843 C

HP DeskJet 843 CXE

HP DeskJet 845 C

HP DeskJet 845 CVR

HP DeskJet 916 C

HP DeskJet 920 C

HP DeskJet 920 CVR

HP DeskJet 920 CXI

HP DeskJet 940 C

HP DeskJet 940 CVR

HP DeskJet 940 CW

HP DeskJet 940 CXI

HP DeskJet 948 C

HP DeskJet 3810

HP DeskJet 3816

HP DeskJet 3820

HP DeskJet 3820 V

HP DeskJet 3820 W

HP DeskJet 3822

HP Digital Copier 310

HP Digital Copier Printer 310

HP FAX 1230

HP FAX 1230 XI

HP OfficeJet 5105

HP OfficeJet 5110

HP OfficeJet 5110 A21

HP OfficeJet 5110 V

HP OfficeJet 5110 XI

HP OfficeJet V-30

HP OfficeJet V-40

HP OfficeJet V-40 XI

HP OfficeJet V-45

HP OfficeJet V

HP Printer Scanner Copier 500

HP Printer Scanner Copier 500 XI

HP Printer Scanner Copier 720

HP Printer Scanner Copier 750

HP Printer Scanner Copier 750 All In One

HP Printer Scanner Copier 750 XI

HP Printer Scanner Copier 750 XI All In One

HP Printer Scanner Copier 760

HP Printer Scanner Copier 920

HP Printer Scanner Copier 950

HP Printer Scanner Copier 950 All In One

HP Printer Scanner Copier 950 VR

HP Printer Scanner Copier 950 VR All In One

HP Printer Scanner Copier 950 XI

HP Printer Scanner Copier 950 XI All In One