A GENUINE PODTRONICS 12 VOLT - 200 watt HIGH OUTPUT SINGLE PHASE REGULATOR/RECTIFIER UNIT, TO REPLACE EXISTING ZENER DIODE AND RECTIFIER. FOR 12 VOLT, SYSTEMS, POSITIVE OR NEGATIVE EARTH. MAY BE USED WITH LUCAS 47239 (180W) ALTERNATOR OR TO CONVERT A 6 VOLT 47204 TO 12 VOLT.