These printers use the 51633 cartridge:
HP DeskJet 300 J
HP DeskJet 310 w/Color Option
HP DeskJet 311
HP DeskJet 320 w/Color Option
HP DeskWriter 310
HP DeskWriter 310 Plus
HP DeskWriter 340
Cycomm 3416 T
Digital-DEC Decmultijet 1000
Digital-DEC Decmultijet 2000
Digital-DEC Multijet 1000
Digital-DEC Multijet 2000
Hermes NJ 225
Hermes NJ 250
NEC PC PR-101 A/J100L
NEC PC PR-101 A/J180L
Smith-Corona Coronajet 200 J