MP603 Adaptor 13 Pin Vehicle To 7 Pin 12N & 12S Trailer. MP603 Adaptor 13 Pin Vehicle to 7 Pin 12N & 12S Trailer. Conversion lead with a 13 Pin plug and 2×7 Pin sockets (12N & 12S). To convert a 13 Pin socket into 12N & 12S 7 Pin sockets.
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