28"W X 8"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 29.75"W X 9.75"H] 18" Diameter Made from high-quality aluminum

Made from high-quality aluminum

+ Product Details Size - The listed 6" diameter refers specifically to the size of the duct opening

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+ Product Description This aluminum flex duct is intended to be used in heating

28"W X 8"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 29.75"W X 9.75"H] 18" Diameter Made from high-quality aluminum+ Product Details Size 28"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 75" width X 9. 75" height. Design Easy unrestricted airflow for your HVAC system 50 angled to provide maximum airflow. High Quality Solid stamped steel with counter sunk screw holes (screws included) and no sharp edges. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed.