26" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 30 5/8"] fixed bar + Product Description Introducing the 4 X 12 Is CRFG2028 Width_14in

+ Product Description Introducing the 8" Radial Damper – Your Solution for Controlled Airflow

+ Product Details Size – 8" x 20" or 20" x 8" is the size for the duct opening measurement only

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actual front end outer dimensions are approximately 27 5/8" width X 36 5/8" height

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26" X 28" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 28 5 8" X 30 5 8"] fixed bar + Product Description Introducing the 4 X 12 Is CRFG2028 Width_14in + Product Description Introducing the 8" Radial Damper – Your Solution for Controlled Airflow + Product Details Size – 8" x 20" or 20" x 8" is the size for the duct opening measurement only