4"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 21.75"H] Copper Coil-Insulated Line Set Our coils have a a

Our coils have a a very high PSI burst pressure

angle the louvers up for efficient cooling

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Our grilles feature a durable powder-coat finish

provides a modern look and quiet operation due to its half-inch by half-inch cube design

4"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 21.75"H] Copper Coil-Insulated Line Set Our coils have a a+ Product Details Size 4"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 21. 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.