10"W X 10"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 11.875"W X 11.875"H] 18in diameter + Product Details Size –

+ Product Details Size – 8"w X 6"h is the size for the duct opening measurement only

The operable dampers

The first number in a grille size

Design – Unrestricted airflow For Your HVAC system - noise free components - no vibrating louvers etc

these grilles ensure easy

10"W X 10"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 11.875"W X 11.875"H] 18in diameter + Product Details Size –+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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