4"W X 16"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 17.75"H] Aluminum padding: 14px 14px

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Key Features:

Pre-flared ends with nuts are for simple and easy installation

actual front end outer dimensions are approximately 37

You may think of grilles and registers as a generic component of the ventilation system in your house

4"W X 16"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 17.75"H] Aluminum padding: 14px 14px+ Product Details Size 4"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 17. 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.