16"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 27.75"h] Copper Coil-Insulated Line Set Filter Size - 5

Filter Size - 5

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 18" duct openings

Design – Individually adjusting curved blades

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 16" or 16" x 12" duct opening (measured at the opening)

16"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 27.75"h] Copper Coil-Insulated Line Set Filter Size - 5+ Product Details Size 16"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 27. 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