TRUaire Stamped Face Return Air Grille, 1-Way, Series: 170, 12 in W x 12 in H x 1/4 in THK, 1/4 in Overall Depth, 199 to 463 cfm, 98 sq-in, 55 deg Deflection, 1/2 in Blade Spacing, Steel, Powder Coated, Import