Kingston KTH4P/4 4MB printer memory module (part number KTH4P/4) is designed for HP LaserJet 4Mp, 6P, and 6Mp series printers. This SIMM-form-factor memory expansion increases available RAM for improved print-job processing, complex document handling, and PostScript performance on compatible HP LaserJet models from the 4/6 series era. Installation is straightforward via the printer's standard memory slot. The module supports typical enterprise printing workflows including large spool management and advanced font caching. Compatible with HP LaserJet 4Mp, 6P, and 6Mp printers. This refurbished unit has been tested and guaranteed, available via quote.