These printers use the 51649 cartridge:

HP DeskJet

HP DeskJet 350

HP DeskJet 350 C-CBI

HP DeskJet 350 C

HP DeskJet 350 CBI

HP DeskJet 350 Series

HP DeskJet 600

HP DeskJet 600 C

HP DeskJet 610

HP DeskJet 610 C

HP DeskJet 610 CL

HP DeskJet 612

HP DeskJet 612 CL

HP DeskJet 612 C

HP DeskJet 630 C

HP DeskJet 632 C

HP DeskJet 640 C

HP DeskJet 642 C

HP DeskJet 648 C

HP DeskJet 650 C

HP DeskJet 656 C

HP DeskJet 656 CVR

HP DeskJet 660

HP DeskJet 660 C

HP DeskJet 660 CSE

HP DeskJet 660 CXI

HP DeskJet 670

HP DeskJet 670 C

HP DeskJet 670 K

HP DeskJet 670 TV

HP DeskJet 672

HP DeskJet 672 C

HP DeskJet 680

HP DeskJet 680 C

HP DeskJet 682

HP DeskJet 682 C

HP DeskJet 690 C

HP DeskJet 691 C

HP DeskJet 692 C

HP DeskJet 693 C

HP DeskJet 694 C

HP DeskJet 695 C

HP DeskJet 695 CCI

HP DeskJet 697 C

HP DeskWriter 600

HP DeskWriter 600 C

HP DeskWriter 600 CSE

HP DeskWriter 660

HP DeskWriter 660 C

HP DeskWriter 660 CSE

HP DeskWriter 680

HP DeskWriter 680 C

HP DeskWriter 682

HP DeskWriter 682 C

HP DeskWriter 690 C

HP DeskWriter 693

HP DeskWriter 693 C

HP DeskWriter 694

HP DeskWriter 694 C

HP OfficeJet 500

HP OfficeJet 520

HP OfficeJet 570

HP OfficeJet 580

HP OfficeJet 590

HP OfficeJet 600

HP OfficeJet 610

HP OfficeJet 630

HP OfficeJet 635

HP OfficeJet 700

HP OfficeJet 710

HP OfficeJet 720

HP OfficeJet 725

HP Printer Scanner Copier 300

HP Printer Scanner Copier 370

HP Printer Scanner Copier 380

Apollo P 2100 U

Apollo P 2100 U Series

Apollo P 2150 U

Apollo P 2200

Apollo P 2200 Series

Apollo P 2250

Apollo P 2300 U Series

Apollo P 2350 U Series

Apollo P 2500 P Series

Apollo P 2500 U Series

Apollo P 2600 P Series

Apollo P 2600 U Series

Apollo P 2800

Apple Color StyleWriter 4100

Apple Color StyleWriter 4500

Apple StyleWriter 4100

Apple StyleWriter 4500

Apple StyleWriter 6500

NEC PC PR-101 A/J180

NEC PC PR-101 A/J200

NEC PC PR-101 A/J300

NEC PR J-700

Sony IJP V-100 VAIO Printer

Sony Vaio IJP-V 100