14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 14 5/8" width X 32 5/8" height -

+ Product Details Size - 30"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 10"h is the size for the duct opening measurement only

+ Product Details Compact and Secure Design - Measures 3-7/8" wide x 3-1/2" high x 3" deep

Actual Filter Size – 9 3/4"w x 35 3/4" x 1"

14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 14 5 8" width X 32 5 8" height + Product Details Size 30"w X 10"h is the size for the duct opening measurement only