6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover w26h26 + Product Details Size –

+ Product Details Size – 28"w X 24"h is the size for the duct opening measurement only

Actual Filter Size – 17 3/4"w x 25 3/4" x 1"

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+ Product Details Size - 22"w X 24"h is the size for the duct opening measurement only

6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover w26h26 + 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