14"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 25.75"h] return grille Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 33 3/4" x 1"

Actual Filter Size – 31 3/4"w x 21 3/4" x 1"

Filter Size - 31

High Quality – High-quality steel with counter-sunk screw holes (screws included) and no sharp edges

Superior Airflow Control: Built-in damper lets you control how much air enters your room

14"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 25.75"h] return grille Actual Filter Size – 17+ Product Details Size 14"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 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