12" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Rectangular Duct Caps + Product Details Size &

+ Product Details Size & Compatibility – The 8" stick-on Side take-off is compatible with duct 8"

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+ Product Description Keep your indoor air clean and your HVAC system running efficiently with the HVAC Premium MERV 2 air filter

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 24" or 24" x 12" duct opening (measured at the opening)

designed for systems up to 500lbs

12" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Rectangular Duct Caps + Product Details Size &+ Product Details Size 12"w X 18"h is the size for the duct opening measurement only, [Outer Dimensions: 14. 5"w X 20. 5"h] Actual Filter Size 11 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,