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 Description This aluminum

+ Product Description This aluminum flex duct is intended to be used in heating

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

+ Product Details Size - 24"w X 16"h is the size for the duct opening measurement only

padding: 14px 14px

+ 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 Description This aluminum+ 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.