Hart Cooley Return Air Grille, Series: 672M, 20 x 20 inch, 19-1/2 inch Duct Width, 19-29/32 inch Duct Height, 21-3/4 inch Overall Width, 5/16 inch Overall Depth, 540 to 1081 cfm, Effective Area: 1.8 sq-ft, 40 deg Deflection, 1/2 inch Blade Spacing Bright White Enamel
