18" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES d you can make sure that

you can make sure that all your tools will fit

+ Product Details Size - 10"w X 36"h is the size for the duct opening measurement only

+ Product Description Maximize your home’s airflow with this premium Air Supply Grille air supply grille

It features an eight-tumbler lock with a supplied key for secure access

18" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES d you can make sure that+ Product Details Size 18"w X 12"h is the size for the duct opening measurement only, [Outer Dimensions: 20. 5"w X 14. 5"h] Actual Filter Size 17 3 4"w x 11 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,