26"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 17.75"h] Fixed Blades with Damper Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 15 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 8" Or 8" x 34" duct opening (measured at the opening)

Design – These are specially sized to fit into all drop ceilings

+ Product Details Size - 34"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 16"w X 14"h X 2"d (for duct opening measurement only)

26"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 17.75"h] Fixed Blades with Damper Actual Filter Size – 11+ Product Details Size 26"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 75" Width X 17. 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