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NEMA L6-30P 30A Generator Power Inlet Box Weatherproof
PowerShelter III - enclosure for storing and running portable generator
Sintron RV Power Outlet Box, 30 Amp 125 Volt, NEMA TT-30R Receptacle, Enclosed Lockable Weatherproof Outdoor Electrical, ETL Listed, for RV Camper Travel Trailer Electric Motorhome Car Generator - Amazon.com