30" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder-Coat actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 26 5/8" width X 30 5/8" height

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 10" duct openings

actual front end outer dimensions are approximately 37

+ Product Details Size – 8"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 12"w X 12"h X 2"d (for duct opening measurement only)

30" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coat actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 26 5 8" width X 30 5 8" height Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 10" duct openings