20"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 27.75"h] Black Actual Front End Outer Dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Actual Front End Outer Dimensions Are 3

High Standard

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 26" or 26" x 8" duct opening (measured at the opening)

Its heavier gauge construction guarantees durability and longevity

+ Product Details Size – 12" x 26" or 26" x 12" is the size for the duct opening measurement only

20"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"w x 27.75"h] Black Actual Front End Outer Dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Actual Front End Outer Dimensions Are 3 High Standard