16"W X 34"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 17.75"W X 35.75"H] Supply Grille 3 * Insulation density is

3 * Insulation density is 30kgs/CBM = 0

+ Product Description Enhance your ventilation system with our high-quality grilles and registers

and centralized air ducted units

Both lines taped together every 18in for easier handling & installation

16"W X 34"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 17.75"W X 35.75"H] Supply Grille 3 * Insulation density is+ Product Details Size 16"w X 34"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" width X 35. 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