Amazon.co.jp: 13 to 7 Pin Adapter Trailer Car Adapter N/S Type Waterproof Plug Socket Converter for Trailer Truck 12V European : Industrial & Scientific
Durite 13 Pin Socket Adaptor - 13 Pin Plug to 2 x 7 Pin Sockets - 12V - Auto Electrical Supplies
AS – Schwabe Adaptor Cable for Car Trailer/Caravan, 13-Pin Male to 7-Pin Male 61475 Black : Amazon.co.uk: DIY & Tools
Towing Adaptor - 7 Pin Towbar to 13-Pin Caravan - Towsure UK
13 to 7 Pin Adaptor Plug Including 13 Pin Parking Cover, ISO 11446 and ISO 1724, for 12 V Trailer Systems, Plug-In Connection for Car to Bicycle Stand, Bicycle Carrier, Trailer : Amazon.de: Automotive
Trailer adapter, 7-13 - Biltema.fi
Adaptor 12N & 12S to 13 Pin Socket | World of Camping