30"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 25.75"h] 18" Round Duct Pipe 75" width X 33

75" width X 33

Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

Looks like it was just waxed

Actual Filter Size – 27 3/4"w x 7 3/4" x 1"

actual front end outer dimensions are approximately 20 5/8" width X 36 5/8" height

30"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 25.75"h] 18" Round Duct Pipe 75" width X 33+ Product Details Size 30"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 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