4"W X 32"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 33.75"H] 18in diameter And is classified as Class

And is classified as Class 1 Fire Proof - B1

but you will appreciate the benefits over the period of time

75" width X 25

+ Product Details Size - 8"w X 30"h is the size for the duct opening measurement only

Experience the difference in quality with our sleek design and hassle-free functionality

4"W X 32"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 33.75"H] 18in diameter And is classified as Class+ Product Details Size 4"w X 32"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 33. 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.