2" Hole size, bonus 4 free screws to help you fix straight blade flanged inlet on the wall quickly. 4 screw holes makes no gap between wall and flange edge. Heavy Duty 15 Amp 125V AC Port Plug with Integrated 18" Extension Cord 14AWG, Flanged Power Inlet Plug NEMA 5-15P 2 Pole 3-Wire w/ Waterproof Cap for Marine Boat RV Caravans Shed.
eBay