10"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 21.75"h] Adjustable Return R value rating of insulation

R value rating of insulation - R3

+ Product Description Introducing the Louver Floor Register from HVAC Premium – your gateway to enhanced home comfort and style

+ Product Details Size - 8"w X 34"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 28 5/8" width X 12 5/8" height

Perfect for both residential and commercial use

10"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 21.75"h] Adjustable Return R value rating of insulation+ Product Details Size 10"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 21. 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