30"W X 12"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 31.875"W X 13.875"H] Material_Steel + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 32" x 32" is the size for the duct opening measurement only

+ Product Details Size - 28"w X 32"h X 2"d (for duct opening measurement only)

+ Product Details Size – 28" x 28" is the size for the duct opening measurement only

75" width X 3

+ Product Details Size - 24"w X 30"h is the size for the duct opening measurement only

30"W X 12"H [Duct Opening] ALUMINUM RETURN GRILLE Easy Air Flow Linear Bar Grilles [Outer Dimensions: 31.875"W X 13.875"H] Material_Steel + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 32" x 32" is the size for the duct opening measurement only + Product Details Size 28"w X 32"h X 2"d (for duct opening measurement only)