12" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Powder-Coated + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 24" or 24" x 12" duct opening (measured at the opening)

+ Product Details Size - 14"w X 25"h is the size for the duct opening measurement only

actual front end outer dimensions are 11

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12" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES Powder Coated + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Perfect Fit & Easy Sizing Designed for a 12" x 24" or 24" x 12" duct opening (measured at the opening) + Product Details Size 14"w X 25"h is the size for the duct opening measurement only