13-Pin to 7-Pin Trailer Socket Adapter - China Trailer Adapter, 7 Pin to 13 Pin | Made-in-China.com
Amazon.com: WESTFALIA Automotive Adaptor 7-pin to 13-pin to Connect 7pin Socket on The Vehicle to 13pin Socket on The Trailer or Bike Carrier : Automotive
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13-pin to 7-pin trailer socket adapter, plastic, 12/24V | ORNO POLSKA - Living innovations