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![Photo 1 of [18x18 Duct Hole] Vent Cover. 4 Way: Aluminum Curved Blade Adjustable Air Supply HVAC Ceiling Diffuser. with Multi-Shutter Parallel Blade Damper, Allowing for Airflow Adjustment [19,625x19.625" Face] 18" x 18"](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1024250507%2FChGyCztCWnHQY8UZREoG6.jpeg?alt=media&token=81fe7d35-9597-4f6c-9658-6c2c07609074)
![Photo 1 of [18x18 Duct Hole] Vent Cover. 4 Way: Aluminum Curved Blade Adjustable Air Supply HVAC Ceiling Diffuser. with Multi-Shutter Parallel Blade Damper, Allowing for Airflow Adjustment [19,625x19.625" Face] 18" x 18"](https://m.media-amazon.com/images/I/61-5VoSOtvL.jpg)