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Seven-Way Blade to 4-Way Flat Trailer Adapter
Multi-Towing Trailer Adapter 4 to 7 Way Round RV Blade and 4 Way Flat Female | eBay
LEDGlow | 7-Pin to Flat 4-Pin Truck Tailgate Trailer Adapter
Kohree 4 Way Flat to 7 Way Round Blade Trailer Adapter
4 Pin to 7 Way Blade RV Trailer Wiring Adapter Connector Cable Plug w/Bracket | eBay
Seven-Way Blade to 4-Way Flat Trailer Adapter
MaxxHaul 7-Way Round to 4-Way Flat Trailer Plug Adaptor with 18 in. Flexible Cable Extends to 36 in. 70086 - The Home Depot
Amazon.com: Oyviny 4-Way Flat to 7-Way Round Blade and 4 Way Trailer Wiring Harness Adapter Vehicle-Side 4 Pin to Trailer-Side 7 Pin and 4 Pin Dual-Output Connector with Mounting Bracket for Truck