20" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3" Round Duct Pipe + How To Measure A

+ How To Measure A Round Vent Overall Size:

+ Product Details Size – 25"w X 24"h is the size for the duct opening measurement only

The round side is crimped for easy insertion

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20" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3" Round Duct Pipe + How To Measure A+ Product Details Size 20"w X 12"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 14. 5"h] Actual Filter Size 19 3 4"w x 11 3 4" x 1" High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Location Sidewall and ceiling. Design Heavier gauge than needed,