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

+ Product Details Size – 20"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 22"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 36"W X 6"H is (for duct opening measurement only)

+ Product Details Size – 14"w X 20"h or 20" x 14" is the size for the duct opening measurement only

16" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 20 Feet Long + Product Details Size –+ Product Details Size 16"w X 20"h is the size for the duct opening measurement only, [Outer Dimensions: 18. 5"w X 22. 5"h] Actual Filter Size 15 3 4"w x 19 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,