16"W X 20"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 17.875"W X 21.875"H] 8" Diameter + Product Details High Quality

+ Product Details High Quality - Aluminum housing on the outside and on the inside for the best insulation value

this diffuser ensures long-lasting durability and adds a touch of elegance to any space

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Actual Filter Size – 31 3/4"w x 23 3/4" x 1"

16"W X 20"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 17.875"W X 21.875"H] 8" Diameter + Product Details High Quality+ Product Details Size 16"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 875" width X 21. 875" height. High Quality High quality aluminum with counter sunk screw holes (screws included) and no sharp edges. Design Unrestricted airflow For Your HVAC system noise free components no vibrating louvers etc. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was