18" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 14" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 37

Enhanced Filtration: Our filters are 25% thicker than competitors'

Item Size: 280 x 125 x 135 mm

Extra Strong Frame – Our frames are the strongest on the market

Premium Plated Finish and Modern Contempo Design Forming a Luxurious Piece

18" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 14" Round Duct Pipe actual front end outer dimensions+ Product Details Size 18"w X 20"h is the size for the duct opening measurement only, [Outer Dimensions: 20. 5"w X 22. 5"h] Actual Filter Size 17 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,