18"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 11.75"h] Copper Coil Say goodbye to vibrating louvers

Say goodbye to vibrating louvers - this grille ensures a quiet

Easy clean Healthy air flow for your HVAC system - noise free components - no vibrating louvers etc

actual front end outer dimensions are approximately 26 5/8" width X 16 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 28" or 28" x 8" duct opening (measured at the opening)

With a 5" diameter for the duct opening measurement

18"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 11.75"h] Copper Coil Say goodbye to vibrating louvers+ Product Details Size 18"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 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