6"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 17.75"h] Width_20in our Radial Damper simplifies the CRFG126 Curved Blade Steel hp birdscreen close

our Radial Damper simplifies the process of managing airflow

Design – This airflow control component are made to connect to HVAC diffuser and restrict airflow

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 28" or 28" x 12" duct opening (measured at the opening)

gymnasiums & restaurants

+ Product Details Size - 26"w X 4"h is the size for the duct opening measurement only

6"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 7.75"w x 17.75"h] Width_20in our Radial Damper simplifies the CRFG126 Curved Blade Steel hp birdscreen close our Radial Damper simplifies the process of managing airflow Design – This airflow control component are made to connect to HVAC diffuser and restrict airflow