30" X 24" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 32 5/8" X 26 5/8"] w25h25 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 20"w X 25"h is the size for the duct opening measurement only

+ Product Details Size – 24" x 24" is the size for the duct opening measurement only

Powder-Coat Finish – Never rust

+ Product Details Size - 28"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 30"h is the size for the duct opening measurement only

30" X 24" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 32 5 8" X 26 5 8"] w25h25 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 20"w X 25"h is the size for the duct opening measurement only + Product Details Size – 24" x 24" is the size for the duct opening measurement only