10"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh -[Outer Dimensions 11.75"w x 11.75"h] Floor Grille actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 12 5/8" height -

+ Product Description Introducing the 3-coned supply grille for a T-bar lay-in

+ Product Details Size - 4"w X 18"h is the size for the duct opening measurement only

Built with rust-resistant aluminum and a scratch-resistant powder-coated finish

Powder-Coat Finish – smooth

10"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh -[Outer Dimensions 11.75"w x 11.75"h] Floor Grille actual front end outer dimensions+ Product Details Size 10"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 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