12" x 12" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 6" Round Duct Pipe provide precise damper control and

provide precise damper control and superior air dispersion

Made of high quality aluminum that will never rust

actual front end outer dimensions are approximately 35

+ Product Details Size – 20"w X 24"h 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 provide precise damper control and+ 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