20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille 10in diameter + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 24"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height

actual front end outer dimensions are approximately 7

+ Product Details Size – 6" x 10" or 10" x 6" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 42 5/8" height

20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille 10in diameter + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 24"w X 20"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 32 5 8" width X 8 5 8" height