HP - C9130-60005 - Memory 8MB DIMM Printer Firmware C9130-60005 - HP - 8MB DIMM RAM Firmware Memory for LaserJet 4550 printer $240.48 $195.51
HP - C4168-60005 - Memory 16MB Firmware DIMM C4168-60005 - HP - 16MB Memory Module Firmware DIMM Memory $318.61 $259.03