These printers use the C4195A cartridge:
HP Color LaserJet 4500
HP Color LaserJet 4500 DN
HP Color LaserJet 4500 HDN
HP Color LaserJet 4500 N
HP Color LaserJet 4500 Series
HP Color LaserJet 4550
HP Color LaserJet 4550 DN
HP Color LaserJet 4550 HDN
HP Color LaserJet 4550 N
HP Color LaserJet 4550 Series
HP LaserJet 4550 ODN