26"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 11.75"h] 2-Way + Product Details Perfect Fit 18" Round Duct Pipe Fixed 45 horizontal blades LO1810

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 24" OR 24" x 28" duct opening (measured at the opening)

+ Product Details Size – 16"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

font-weight: 500

Quality Packaging - Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

26"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 27.75"w x 11.75"h] 2 Way + Product Details Perfect Fit 18" Round Duct Pipe Fixed 45 horizontal blades LO1810 + Product Details Perfect Fit & Easy Sizing Designed for a 28" x 24" OR 24" x 28" duct opening (measured at the opening) + Product Details Size – 16"w X 30"h is the size for the duct opening measurement only