10" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w4h4 + Product Details Size –

+ Product Details Size – 34" x 36" or 36" x 34" is the size for the duct opening measurement only

1 piece of wall cover

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Crafted from heavy-duty reinforced steel

10" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w4h4 + Product Details Size –+ Product Details Size 10"w X 20"h is the size for the duct opening measurement only, [Outer Dimensions: 12. 5"w X 22. 5"h] Actual Filter Size 9 3 4"w x 21 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,