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 Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 17 3/4" x 1"

R value rating of insulation - R3

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

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

High Quality – Solid rigid steel body for durability and reliability with dampers operable by switch for airflow directional control

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 Actual Filter Size – 13+ 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