Product Info Catalog Electrical & Lighting Electrical Accessories Boxes 4-Inch Flat Corner Square Single GFI Receptacle Box Cover 4-Inch Flat Corner Square Single GFI Receptacle Box Cover Request a Quote UPC: 50169999837 Manufacturer: Raco Incorporated SKU: 208777 Model Number: 808C 4" Flat Corner Square Single Ground Fault Interrupter Receptacle Box Cover, 1/2" Rise, Steel, Exposed Work, 7-1/3 CUIN.