HP DeskJet 722C 600 600 cartridge: 51645A (Black); C1823A (Color) http://www.hp.com/cposupport/eschome.html SCP,VLINK Hewlett-Packard DeskJet 720 Series HEWLETT-PACKARD DESKJET 720C A pnm2ppa PPA printer, does not work with PCL drivers (as "hpijs", "gimp-print", "cdjXXX", "pcl3", ...) <p> The "Cse" and "Cxi" are probably the same hardware but shipped with different Windows toys.