6"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 7.75"h] Powder Coated sized to fit into all

sized to fit into all drop ceiling system

actual front end outer dimensions are approximately 27 5/8" width X 26 5/8" height

+ Product Details Size - 34"w X 20"h is the size for the duct opening measurement only

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actual front end outer dimensions are approximately 20 5/8" width X 28 5/8" height

6"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 7.75"h] Powder Coated sized to fit into all+ Product Details Size 6"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 7. 75" Width X 7. 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