30"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 7.75"h] Aluminum Bar + Product Details Size –

+ Product Details Size – 36"w X 34"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 27 5/8" height

+ Product Details Size - 36"w X 12"h X 2"d (for duct opening measurement only)

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

5" width x 13

30"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 7.75"h] Aluminum Bar + Product Details Size –+ Product Details Size 30"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 75" Width X 7. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never wear