6" x 6" - 2-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12" Round Duct Pipe + Product Details Size -

+ Product Details Size - 22"w X 34"h is the size for the duct opening measurement only

Universal Fit – With dimensions of 4-1/8" wide x 7-1/16" high x 2-1/8"

+ Product Details Size - 30"w X 32"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 32"h is the size for the duct opening measurement only

Actual Filter Size – 19 3/4"w x 9 3/4" x 1"

6" x 6" - 2-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12" Round Duct Pipe + Product Details Size -+ Product Details Size 6" X 6" 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