16"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 17.75"w x 17.75"h] 10in diameter 1/4" - 6518 PSI

1/4" - 6518 PSI

+ Product Details Size - 16"w X 24"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 32 5/8" width X 18 5/8" height

+ Product Details Size - 4" Diameter is the size for the duct opening measurement only

+ Product Details Size – 20" x 20" is the size for the duct opening measurement only

16"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 17.75"w x 17.75"h] 10in diameter 1/4" - 6518 PSI+ Product Details Size 16"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 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