18" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Floor Grille Watch the video

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+ Product Details Size – 30"w X 12"h is the size for the duct opening measurement only

Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

+ Product Details Size - 22"w X 8"h is the size for the duct opening measurement only

18" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Floor Grille Watch the video+ Product Details Size 18"w X 18"h is the size for the duct opening measurement only, [Outer Dimensions: 20. 5"w X 20. 5"h] Actual Filter Size 17 3 4"w x 17 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,