32"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 17.75"h] White Solid Base Construction – Features

Solid Base Construction – Features a solid base for stable installation and reliable protection

+ Product Details Size – 6" x 18" or 18" x 6" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 38 5/8" width X 10 5/8" height

+ Product Details Size - 4"w X 10"h is the size for the duct opening measurement only

And The Cooler Air From Outside WIll Flow In From The Bottom

32"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 17.75"h] White Solid Base Construction – Features+ Product Details Size 32"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 75" Width X 17. 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