Replacing or buying new Durable Air Return Grills/Vent Covers for your Home: This Cast Iron 10″ X 30″ size fits most Standard air duct opening sizes for walls, ceilings, and floors – Indoor use. It returns cold air from the room for better circulation. These air return grills are sand cast, hand-crafted, and finished. The vent cover’s overall top Faceplate Size is 12″ x 32-1/2″. The face plate thickness is 5mm in most cases, the outer dimensions of the cover faceplate are 1″ or longer on each side/direction. Designs/Pattern: Freshen up the look of your home with the stylish and attractive decorative Tudor Mushroom design, which comes in a choice of colors and sizes. This pattern is available in matching Floor Registers and vents, and over 100 sizes are available. It will add beauty and a rich look to any of your traditional, old contemporary home rooms. Skilled craftsmen make it and offer a beautiful contrast with your walls, ceiling, and flooring, whether carpet, tile, or wood!