34"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 29.75"h] Powder Coated High Quality - Our high Suitable for all AC 8in diameter 12125SDCLNGBX

High Quality - Our high quality rigid steel is the longest lasting grille on the market

+ Product Details Size - 10"w X 30"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 30" OR 30" x 18" duct opening (measured at the opening)

actual front end outer dimensions are approximately 27 5/8" width X 30 5/8" height

34"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 35.75"w x 29.75"h] Powder Coated High Quality Our high Suitable for all AC 8in diameter 12125SDCLNGBX High Quality Our high quality rigid steel is the longest lasting grille on the market + Product Details Size 10"w X 30"h is the size for the duct opening measurement only