Compatible with the following printers; HP Colour LaserJet 5500dn, HP Colour LaserJet 5500dtn, HP Colour LaserJet 5500hdn, HP Colour LaserJet 5500n, HP Colour LaserJet 5550, HP Colour LaserJet 5550dn, HP Colour LaserJet 5550dtn, HP Colour LaserJet 5550hdn, HP Colour LaserJet 5550n