12"W X 36"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 13.875"W X 37.875"H] Insulated Line + Product Details Size –

+ Product Details Size – 20"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - 8"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 18 5/8" height

but still very thin

baffles and plaster frames available

12"W X 36"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 13.875"W X 37.875"H] Insulated Line + Product Details Size –+ Product Details Size 12"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 875" width X 37. 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