6"W X 36"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 7.75"W X 37.75"H] w25h25 + Product Details Size -

+ Product Details Size - 12"w X 32"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 36" OR 36" X 14" duct opening (measured at the opening)

Having an HVAC Access Door will give easy access to the mechanical features of the system

14"w X 4"h Is The Size For The Duct Opening Measurement Only

With a 6" diameter for the duct opening measurement

6"W X 36"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 7.75"W X 37.75"H] w25h25 + Product Details Size -+ Product Details Size 6"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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.