20" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Insulated Flexible Ducts R-6.0 + Product Details Size –

+ Product Details Size – 10"w X 18"h is the size for the duct opening measurement only

9% pure copper meeting ASTM B280 and C12200 standards

+ Product Details Size - 24"w X 32"h is the size for the duct opening measurement only

SEE BELOW IN DESCRIPTION HOW TO MEASURE A FLOOR REGISTER

20" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Insulated Flexible Ducts R-6.0 + Product Details Size –+ Product Details Size 20"w X 16"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 18. 5"h] Actual Filter Size 19 3 4"w x 15 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,