36" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Supply Grille + Product Details Size -

+ Product Details Size - 12"w X 4"h is the size for the duct opening measurement only

this model ensures top-notch air quality

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

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

36" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Supply Grille + Product Details Size -+ Product Details Size 36"w X 24"h is the size for the duct opening measurement only, [Outer Dimensions: 38. 5"w X 26. 5"h] Actual Filter Size 35 3 4"w x 23 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,