20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES return grille The tool-free latch allows hassle-free

The tool-free latch allows hassle-free maintenance

is the same as a 1/8" Plumbing1fitting

+ Product Details Size - 6"w X 12"h X 2"d (for duct opening measurement only)

} + Product Details Size & Compatibility - The size of a boot register end is 12" X 4" X 6" galvanized floor boot end center 26-gauge

+ Product Details Size - 6"w X 16"h X 2"d (for duct opening measurement only)

20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES return grille The tool-free latch allows hassle-free+ Product Details Size 20"w X 18"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 20. 5"h] Actual Filter Size 19 3 4"w x 17 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,