CURT Electrical Adapter (6-Way Round Vehicle to 4-Way Flat Trailer) 57620 - The Home Depot
7-Way Round to 4-Way Flat Pin Adapter For Trailer Tow Hitch & Redline Tailgate LED – OPT7 Lighting Inc
Trailer Light Adapter Plug 6 Round to Flat 4 pin - The Trailer Shoppe
Amazon.com: NEWSUN® 4 Way Flat to 6 Way Round Connector Vehicle Side Trailer Light Pre-Wired Adapter 12" Harness with Mounting Bracket, with Anti-Dust Cover, Water-Proof for Trailer, Truck, GM Pick-up,Hauler : Automotive
Amazon.com: Weatherproof 7 Way Flat Blade to 4 Way Pin Adapter,6-24V 7 to 4 Pin Trailer Plug Adapter Blade Round Socket Connector Converter for Caravan Towbar : Automotive
Trailer 6 Pole to 4 Pole Connector Adapter - RecPro
Amazon.com: NEWSUN® 4 Way Flat to 6 Way Round Connector Vehicle Side Trailer Light Pre-Wired Adapter 12" Harness with Mounting Bracket, with Anti-Dust Cover, Water-Proof for Trailer, Truck, GM Pick-up,Hauler : Automotive