12"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 37.75"h] Material_Aluminum actual front end outer dimensions

actual front end outer dimensions are approximately 36 5/8" width X 10 5/8" height

Design – These Supply Diffusers with integral round necks are recommended for heating

actual front end outer dimensions are approximately 38 5/8" width X 20 5/8" height -

High Standard Quality - Every part is hand inspected for quality before it is packaged

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

12"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 37.75"h] Material_Aluminum actual front end outer dimensions+ Product Details Size 12"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 37. 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