16"W X 25"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 17.875"W X 25.875"H] return grille + Product Details Size -

+ Product Details Size - 4"w X 18"h is the size for the duct opening measurement only

providing the flexibility to match specific ventilation requirements or personal comfort levels

Actual Filter Size – 13 3/4"w x 21 3/4" x 1"

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 8" duct openings

16"W X 25"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 17.875"W X 25.875"H] return grille + Product Details Size -+ Product Details Size 16"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 875" width X 26. 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