12"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 29.75"h] 10" Round Duct Pipe + Product Spec Sheet Aluminum

+ Product Spec Sheet Aluminum Return Grille Spec Sheet

+ Product Details Size – 30"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 24"h X 2"d (for duct opening measurement only)

each diffuser is carefully shrink-wrapped with a sturdy cardboard backing

12"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 29.75"h] 10" Round Duct Pipe + Product Spec Sheet Aluminum+ Product Details Size 12"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 29. 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