20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES tape + Product Details Size –

+ Product Details Size – Stick-on collar is 10" and it is compatible with duct 10"

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32"w X 8"h Is The Size For The Duct Opening Measurement Only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 10" OR 10" x 28" duct opening (measured at the opening)

our damper is designed to perfectly align with your setup

20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES tape + Product Details Size –+ 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,