Midwest U041 70A SURFACE 30/20Manufacturer's Part #: U041 Midwest 70A Surface 30 20 Power Outlet Midwest Electrics metallic RV units are manufactured using 16 gauge, galvanized zinc coated steel and NEMA 3R construction, which resists corrosion and fading and provides lasting service in outdoor applications. Units are available in surface mount and earth burial or padmount posts, offering a wide range of receptacle configurations to fit your needs. Specifications Mounting Surface