17"W X 10"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 18.875"W X 11.875"H] w12h12 The unique sponge gasket ensures

The unique sponge gasket ensures an airtight seal

We pride ourselves on offering top-of-the-line products that meet the highest standards

actual front end outer dimensions are approximately 36 5/8" width X 30 5/8" height

The total outer size of this grille is the listed size plus 1

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 12" duct openings

17"W X 10"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 18.875"W X 11.875"H] w12h12 The unique sponge gasket ensures+ Product Details Size 17"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 18. 875" width X 11. 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