12" x 12" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 6" Round Duct Pipe + Product Details Size –

+ Product Details Size – 20"w X 24"h is the size for the duct opening measurement only

32"w X 8"h Is The Size For The Duct Opening Measurement Only

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+ Product Details Size – 8" x 12" or 12" x 8" is the size for the duct opening measurement only

12" x 12" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 6" Round Duct Pipe + Product Details Size –+ Product Details Size 12" X 12" 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