RVGUARD 50 Amp 125/250 Volt RV/EV Power Outlet Box, Enclosed Lockable – rvguard
AP Products 16-00578 Replacement Plug Connector - 50 Amp Male
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Amazon.com: Kohree 30 Amp to 50 Amp RV Plug Adapter 18", Heavy Duty RV Dogbone Electrical Adapter 30A Male to 50A Female Power Cord with Grip Handle, 125V/3750W : Automotive