28"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 9.75"h] 6" Diameter Actual Filter Size – 29 4 X 12 Is CRFG2028 Width_14in

Actual Filter Size – 29 3/4"w x 31 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 34" OR 34" x 28" duct opening (measured at the opening)

Wall & Ceiling Applications

Equipped with a lever for easy airflow adjustment and dampening

6" width X 5

28"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 29.75"w x 9.75"h] 6" Diameter Actual Filter Size – 29 4 X 12 Is CRFG2028 Width_14in Actual Filter Size – 29 3 4"w x 31 3 4" x 1" + Product Details Perfect Fit & Easy Sizing Designed for a 28" x 34" OR 34" x 28" duct opening (measured at the opening)