8"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 31.75"h] Floor Grille Design – Easy unrestricted air

Design – Easy unrestricted air flow for your HVAC system

+Why Hvac Premium HVAC Premium has been providing superior quality service for many years

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

+ Product Details Size - 18"w X 36"h is the size for the duct opening measurement only

8"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 31.75"h] Floor Grille Design – Easy unrestricted air+ Product Details Size 8"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 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 wear