20" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3" Round Duct Pipe + How To Measure A

+ How To Measure A Round Vent Overall Size:

Design – Rigid gauge ABS plastic

+ Product Details Size & Compatibility – The 8" galvanized sheet metal round to oval end boot is compatible with duct 8"

making it a reliable choice for improving indoor air quality

+ Product Details Size - 25"w X 8"h is the size for the duct opening measurement only

20" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3" Round Duct Pipe + How To Measure A+ Product Details Size 20"w X 12"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 14. 5"h] Actual Filter Size 19 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,