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MaxxHaul 7-Way Round to 4-Way Flat Trailer Plug Adaptor with 18 in. Flexible Cable Extends to 36 in. 70086
Hopkins 47205 4-Wire Flat To 7-Way Round RV Blade Plug Adapter | MFG# 47205 | 28846 | Hanna Trailer Supply
Reese Towpower 6-Round to 4-Flat Plug-In Adapter - Kellogg Supply