22"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 11.75"h] Color_R-4.2 Yellow + Product Details Size – Product Details Size 14 CRG828 7" Round Duct Pipe

+ Product Details Size – 8"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 18"w X 28"h is the size for the duct opening measurement only

Design – Easy unrestricted airflow for your HVAC system - 50° angled to provide maximum airflow

+ Product Details Operating Temperature From -40°F To +248°F [-40°C To +120°C]

Design – Individually adjusting curved blades

22"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 23.75"w x 11.75"h] Color_R 4.2 Yellow + Product Details Size – Product Details Size 14 CRG828 7" Round Duct Pipe + Product Details Size – 8"w X 36"h is the size for the duct opening measurement only + Product Details Size – 18"w X 28"h is the size for the duct opening measurement only