30"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 23.75"h] Grilles ensuring it arrives in perfect Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

ensuring it arrives in perfect condition

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 14" or 14" x 8" duct opening (measured at the opening)

Roundover Beveled Edges

actual front end outer dimensions are 21

+ Product Details Size - 12"w X 36"h is the size for the duct opening measurement only

30"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 31.75"w x 23.75"h] Grilles ensuring it arrives in perfect Compatible With Duct 7in Applications This sheet metal DDAG A 1212 ensuring it arrives in perfect condition + Product Details Perfect Fit & Easy Sizing Designed for a 8" x 14" or 14" x 8" duct opening (measured at the opening)