10"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh -[Outer Dimensions 11.75"w x 11.75"h] Return Actual Filter Size – 19

Actual Filter Size – 19 3/4"w x 9 3/4" x 1"

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+ Product Details Size - 16"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are 26

+ Product Details Universal Fit - Accommodates almost any thermostat with dimensions of 8-1/4" H x 5-3/8" W x 3-1/2" D

10"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh -[Outer Dimensions 11.75"w x 11.75"h] Return Actual Filter Size – 19+ Product Details Size 10"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 11. 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