28"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 29.875"W X 17.875"H] Insulated Line 9% Pure Copper meeting ASTM

9% Pure Copper meeting ASTM B280 standards

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 6" duct openings

+ Product Details Size - 36"w X 16"h X 2"d (for duct opening measurement only)

It comes with two versatile mounting base options—solid and ring—making installation simple and flexible

Dimensions With Outer End are 19

28"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 29.875"W X 17.875"H] Insulated Line 9% Pure Copper meeting ASTM+ Product Details Size 28"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 875" width X 17. 875" height. High Quality High quality aluminum with counter sunk screw holes (screws included) and no sharp edges. Design Unrestricted airflow For Your HVAC system noise free components no vibrating louvers etc. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was