Rustic Decor Supply and Return Grilles are made from sturdy 11-12 gauge metal. Every grille has an enduring powder coated finish in a beautiful bronze rust color (or you can paint them to match your Decor, they faux paint beautifully). All Supply Registers come with an attached Opposed Blade Damper that will achieve the correct air flow volume to every room in your home. Our Return Air Grilles have an attached screen that helps to hide the return air duct opening and enhance the beauty of the return. If you have your own dampers or screens, or they aren