4"W X 36"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 37.75"H] 18" Diameter For a visual guide on

For a visual guide on how to measure your vent hole before ordering a grille

but you will appreciate the benefits over the period of time

+ Product Details Size – 18" Corner Baseboard Grille - White - HVAC corner vent cover

actual front end outer dimensions are approximately 11

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4"W X 36"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 37.75"H] 18" Diameter For a visual guide on+ Product Details Size 4"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 37. 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.