Pass & Seymour 1-Gang Blank insert wallplate is made of steel for enhanced durability. Insert is 1.3-Inch thick and provides a great way to conceal an unused electrical outlet for safety in residential/commercial areas. It is box mountable and measures 1.300 Inch x 3.812 Inch x 1.300 Inch. It features mounting strap for blank insert. Insert is UL listed.