20" X 36" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Ducting Components + Product Details Size -

+ Product Details Size - 30"w X 25"h is the size for the duct opening measurement only

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

Optional Butterfly Damper Available At Asin: B007CNEL1W

Iron and Stainless Steel Tube/Pipe - Comes with Handle that attaches easily to cutters

20" X 36" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Ducting Components + Product Details Size -+ Product Details Size 20"w X 36"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 38. 5"h] Actual Filter Size 19 3 4"w x 35 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,