36" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 4" Round Duct Pipe + Product Details Size -

+ Product Details Size - 24"W X 6"H is (for duct opening measurement only)

+ Product Details Size – 16" x 24" or 24" x 16" is the size for the duct opening measurement only

With its fully removable feature and safety hook

The total outer size of this grille is the listed size plus 1

Actual Filter Size – 27 3/4"w x 7 3/4" x 1"

36" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 4" Round Duct Pipe + Product Details Size -+ Product Details Size 36"w X 20"h is the size for the duct opening measurement only, [Outer Dimensions: 38. 5"w X 22. 5"h] Actual Filter Size 35 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,