Generator Male Receptacle For Marine Boat Rv Shed Electrical, Welluck. ?15 Amp Flanged Inlet?: No oxidation for the Nickel coated copper pole on the plug, made of premium copper and Nylon plastic to avoid the damage of UV degradation and chemicals, rugged and durable for indoor and outdoor. ?Easy Reliable Installation?: 2" Hole size required, clear see-thru wiring block (Black-Hot, Green-Ground, Silver-Neutral), and 4 long Stainless Steel screws will fix straight blade flanged inlet on the hole or wall more tightly. No gap on the edge! ? Weatherproof Cover?: ETL approved, and the flanged power inlet cap and back cover will protect it from the rain storm, snows, dust and even works well in Western Colorado winters, without crack and leak. ?Wire Up As You Wish? : Define the Length and Diameter of the cord based on actual need. Flanged electrical inlet receptacle accommodates 12-18 AWG gauge wires, suitable for No. 12-3 through No. 18-3 cords grip. ?Widely Compatible?: As a generator or battery charger plug to energize your electrical devices. Widely used in trailer, camper, RV, car, boat, marine, block heater,home, bumper, recessed outlet box, etc