10"W X 6"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 11.75"W X 7.75"H] w36h36 + Product Details Size –

+ Product Details Size – 6" x 12" or 12" x 6" is the size for the duct opening measurement only

Do not measure the overall size of the register itself

+ Product Details Size – 18"w X 8"h is the size for the duct opening measurement only

Powder-Coat Finish – Smooth

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

10"W X 6"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 11.75"W X 7.75"H] w36h36 + Product Details Size –+ Product Details Size 10"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 7. 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.