36"W X 8"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 37.75"W X 9.75"H] Color_Black + Product Details Size -

+ Product Details Size - 4"w X 16"h is the size for the duct opening measurement only

padding: 14px 14px

+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

+ Product Details Size - 20"w X 36"h is the size for the duct opening measurement only

36"W X 8"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 37.75"W X 9.75"H] Color_Black + Product Details Size -+ Product Details Size 36"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 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.