8"W X 4"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 5.75"H] 2-Way hp-mullion-popup { position: fixed

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and its seamless drop-in installation process ensures effortless setup

Horizontal performance assures confident use of cooling temperature differential of 30 degrees Fahrenheit and greater

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+ Product Details Size - 10"w X 6"h is the size for the duct opening measurement only

8"W X 4"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 5.75"H] 2-Way hp-mullion-popup { position: fixed+ Product Details Size 8"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 5. 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.