These printers use the Q5942X cartridge:
HP LaserJet 4200
HP LaserJet 4200 DTN
HP LaserJet 4200 DTNS
HP LaserJet 4200 DTNS1
HP LaserJet 4200 DTNSL
HP LaserJet 4200 N
HP LaserJet 4200 Series
HP LaserJet 4200 TN
HP LaserJet 4250
HP LaserJet 4250 DTN
HP LaserJet 4250 DTNSL
HP LaserJet 4250 N
HP LaserJet 4250 TN
HP LaserJet 4300
HP LaserJet 4300 DTN
HP LaserJet 4300 DTNS
HP LaserJet 4300 DTNS1
HP LaserJet 4300 DTNSL
HP LaserJet 4300 N
HP LaserJet 4300 Series
HP LaserJet 4300 TN
HP LaserJet 4345 MFP
HP LaserJet 4345 X MFP
HP LaserJet 4345 XM MFP
HP LaserJet 4345 XS MFP
HP LaserJet 4350
HP LaserJet 4350 DTN
HP LaserJet 4350 DTNSL
HP LaserJet 4350 N
HP LaserJet 4350 TN
HP LaserJet M-4345 MFP
HP LaserJet M-4345 X
HP LaserJet M-4345 XM
HP LaserJet M-4345 XS
Kodak DIGITAL SCIENCE 1000 PS
TROY-Systems Troy 4200
TROY-Systems Troy 4200 EX
TROY-Systems Troy 4250
TROY-Systems Troy 4250 /T
TROY-Systems Troy 4250 /T SECURE
TROY-Systems Troy 4250 /TSECURE EX
TROY-Systems Troy 4300
TROY-Systems Troy 4300 SECURE
TROY-Systems Troy 4300 SECURE EX
TROY-Systems Troy 4350
TROY-Systems Troy 4350 N/NT
TROY-Systems Troy 4350 N/NTSECUEX
TROY-Systems Troy 4350 N/NTSECURE