20" X 40" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Aluminum + Product Details Size –

+ Product Details Size – 32"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 22"h X 2"d (for duct opening measurement only)

+ Product Details Size & Compatibility – The size of sheet metal pipe is 4" round x 120" long

+ Product Details Size - 30"w X 36"h X 2"d (for duct opening measurement only)

designed to stop all types of fittings and terminate rectangular duct runs

20" X 40" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Aluminum + Product Details Size –+ Product Details Size 20"w X 40"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 42. 5"h] Actual Filter Size 19 3 4"w x 39 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,