6" x 6" - 2-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Grille plus { display: inline-block

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+ Product Details Size - 18"w X 14"h is the size for the duct opening measurement only

transparent design and durable construction

The total outer size of this grille is the listed size plus 1

6" x 6" - 2-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Grille plus { display: inline-block+ 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