18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 6" Diameter Built-in RFI (Radio Frequency Interference)

Built-in RFI (Radio Frequency Interference) filter for clean operation

+ Product Details Size – 2"h X 14"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 8" duct openings

and all locks open with just one key

actual front end outer dimensions are approximately 14 5/8" width X 36 5/8" height

18" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 6" Diameter Built-in RFI (Radio Frequency Interference)+ Product Details + Product Details Size 18"w X 16"h is the size for the duct opening measurement only, [Outer Dimensions: 20. 5"w X 18. 5"h] Actual Filter Size 17 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