Product details:

Return Air Filter Grille for 24 inchx24 inch Duct Opening, White, Steel* 1/3 inchspaced fins set at 20 degrees. * Effectively conceals filter. * Use standard 1 inch thick disposable filters (not included). * This model has fixed hinges so that you can't completely remove the door. * Equipped with adjustable filter retainers. * Primary use: Side wall and ceiling. * Screws are included with the system, standard. * All-steel construction. * Durable white powder coated. * Standard color is white (Ral9016). How To Measure A Grille - Always measure the size of the duct opening (the "hole" in the duct/wall). Do not measure the entire size of the register itself. Each grille has a front face frame, that will overlay at wall joint. Entire outer size of the grille is; listed size +2 5/8-inch. - Understanding Width & Height - In a grille size, the first number always represents the width and the second one is the height. As an Example: If the hole on your wall/duct is 24 inch wide by 24 inch tall, order a 24x24. For this particular product you're viewing at the moment, the hole on your wall/duct opening should be 24 inch - Wx24 inch - H.Click the 'Add To Cart' button now to order your Return Air Filter Grille!