16"W X 4"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 17.75"W X 5.75"H] Color_Aluminum + Product Details Size -

+ Product Details Size - 12"w X 18"h is the size for the duct opening measurement only

the second number represents the height

strong aluminum construction with smooth finished edges for easy and safe use

High Quality – High-quality aluminum with counter-sunk screw holes (screws included) and no sharp edges

Why HVAC Premium

16"W X 4"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 17.75"W X 5.75"H] Color_Aluminum + Product Details Size -+ Product Details Size 16"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" width X 5. 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.