12"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 9.75"h] Powder Coated Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 9 3/4" x 1"

+ Product Details Size - 10"w X 16"h X 2"d (for duct opening measurement only)

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+ Product Details Size – 15" Corner Baseboard Grille - White - HVAC corner vent cover

Filter Size - 31

12"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 9.75"h] Powder Coated Actual Filter Size – 27+ Product Details Size 12"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 9. 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 wear