Hart & Cooley by Duravent Return Air Grille, Series: 672M, 12 in W x 12 in H, 11-1/2 in Duct Width, 11-29/32 in Duct Height, 13-3/4 in Overall Width, 5/16 in Overall Depth, 197 to 395 cfm, 0.66 sq-ft, 40 deg Deflection, 1/2 in Blade Spacing, Steel, Bright White Enamel, Domestic,