Appleton® Cover and Box, 1-Gang Feed-Through, For Use With: EFSR-GFI Factory Sealed Ground Fault Circuit Interrupter, 125 VAC, 20 A, 50 to 60 Hz, 5 mA, NEMA 3/3R/7BCD/9EFG, Surface mount, 1 in Hub, Malleable Iron, Baked Epoxy Clad, Gray,