36"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 7.75"h] Color_Anodized Aluminum + Product Details Size –

+ Product Details Size – 28"w X 22"h is the size for the duct opening measurement only

Actual Filter Size – 15 3/4"w x 7 3/4" x 1"

R value rating of insulation - R3

efficient airflow

Design – Cubic core eggcrate design Offers highest airflow efficiency at almost 95%

36"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 7.75"h] Color_Anodized Aluminum + Product Details Size –+ Product Details Size 36"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 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