8"W X 14"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 15.75"H] Height_18in The door comes equipped with

The door comes equipped with a user-friendly turn lock

+ Product Details Size - 12"w X 14"h is the size for the duct opening measurement only

larger than the same nominal size "plumbing" pipe

+ Product Details Size – Sheet metal duct board take off start collar is 16" and it is compatible with duct 16"

8"W X 14"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 15.75"H] Height_18in The door comes equipped with+ Product Details Size 8"w X 14"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 15. 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.