Round Electrical Box Cover with 1/2 Inch Knockout, Flat Outlet Box Cover, 4 Inch Metal Junction Box Covers for 4 inch Octagonal Box and Round Box (6pcs)

Round Electrical Box Cover with 1/2 Inch Knockout, Flat Outlet Box Cover, 4 Inch Metal Junction Box Covers for 4 inch Octagonal Box and Round Box (6pcs) | COMPATIBILITY: Designed to fit 4-inch round and octagonal electrical junction boxes for versatile installation applications | CONSTRUCTION: Made of durable metal material to provide reliable protection and coverage for electrical box openings | Standard Size Diameter: 4inch, designed to cover 4 inch octagonal or round box, make the electrical box safe and pleasing to the eye. These electrical box covers offer a 1/2 in. knockout in the center for easy access into the box