12"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 31.75"h] 6" Round Duct Pipe including the ability to mount

including the ability to mount without removing the thermostat when using the ring base

+ Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only

85" width X 25

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+ Product Details Size – 12" x 16" or 16" x 12" is the size for the duct opening measurement only

12"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 31.75"h] 6" Round Duct Pipe including the ability to mount+ Product Details Size 12"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 31. 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