18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 25.75"h] 6" Round Duct Pipe 4" X 12" Is The

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

actual front end outer dimensions are approximately 14 5/8" width X 26 5/8" height

Actual Filter Size – 13 3/4"w x 21 3/4" x 1"

Actual Filter Size – 24 3/4"w x 19 3/4" x 1"

High Quality – Heavy-gauge all-steel construction

18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 25.75"h] 6" Round Duct Pipe 4" X 12" Is The+ Product Details Size 18"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 25. 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