34"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 17.75"h] w18h18 For added versatility Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

For added versatility

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 24" OR 24" x 36" duct opening (measured at the opening)

+ Product Details Size - 24"w X 10"h X 2"d (for duct opening measurement only)

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 18" duct openings

R Value Rating of Insulation - R3

34"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 35.75"w x 17.75"h] w18h18 For added versatility Compatible With Duct 7in Applications This sheet metal DDAG A 1212 For added versatility + Product Details Perfect Fit & Easy Sizing Designed for a 36" x 24" OR 24" x 36" duct opening (measured at the opening)