8" x 8" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Powder Coated actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 12 5/8" height

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+ Product Details Size - 18"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 10"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 32 5/8" height

8" x 8" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Powder Coated actual front end outer dimensions+ Product Details Size 8" X 8" is the size for the duct opening measurement only, actual front end outer dimensions are 3". Design Equipped with lever for full airflow control; back blades made of black plastic for reduced air noise and discreet appearance; "Opposing" back blades, ensuring they don't overlap, provide precise damper control and superior air dispersion. High Quality Aluminum The premium durable aluminum will never rust and it will never