The 190 series is a Return Air Filter Grille used for sidewall or ceiling openings. Our product is constructed to ensure maximum airflow and compliment your home decor. Using our return air filter grille to outfit your ventilation system will improve your home circulation. TRUaire™ Return Air Filter Grille, 1-Way Removable Stamped Face, Series: 190RF, 24 x 10 in, 26-7/8 in Overall Width, 1-3/4 in Overall Depth, 765 cfm, 1.09 sq-ft, 55 deg Deflection, 1/2 in Blade Spacing, Steel, Pristine White Powder Coated, Import