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] Material_Anodized Aluminum Actual Filter Size – 9

Actual Filter Size – 9 3/4"w x 17 3/4" x 1"

of up to 300m3/h

Actual Filter Size – 25 3/4"w x 5 3/4" x 1"

+ Product Details Size – 26"w X 18"h is the size for the duct opening measurement only

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] Material_Anodized Aluminum Actual Filter Size – 9+ 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