16"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 17.75"w x 17.75"h] flat stamped steel actual front end outer dimensions RG1620AL Quality Packaging carefully packaged 8 Feet Long

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height -

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 12" or 12" x 8" duct opening (measured at the opening)

+ Product Details Size - 6"w X 8"h X 2"d (for duct opening measurement only)

875" width X 10" height

16"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh White [Outer Dimensions 17.75"w x 17.75"h] flat stamped steel actual front end outer dimensions RG1620AL Quality Packaging carefully packaged 8 Feet Long actual front end outer dimensions are approximately 14 5 8" width X 38 5 8" height + Product Details Perfect Fit & Easy Sizing Designed for a 8" x 12" or 12" x 8" duct opening (measured at the opening)