12"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 19.75"h] Copper Coil-Insulated Line Set + Product Details Size –

+ Product Details Size – 26"w X 6"h is the size for the duct opening measurement only

+ Product Details Size – 12" X 2" is the size for the duct opening (floor/vent hole) measurement only

plus { display: inline-block

and then smoothly drop in the grill

The vent also has a bug screen to eliminate pest intrusion

12"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 19.75"h] Copper Coil-Insulated Line Set + Product Details Size –+ Product Details Size 12"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 19. 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