30"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 33.75"h] Color_Aluminum Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 33 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 18" OR 18" x 32" duct opening (measured at the opening)

Actual Filter Size – 9 3/4"w x 35 3/4" x 1"

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

30"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 33.75"h] Color_Aluminum Actual Filter Size – 17+ Product Details Size 30"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 75" Width X 33. 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