6"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 11.75"h] 3-Way or 4-Way with actual outer dimensions of

with actual outer dimensions of 28

The powder-coated finish ensures a sleek look while protecting the grille from wear and tear

+ Product Details Size – 18"w X 10"h is the size for the duct opening measurement only

Actual Filter Size – 27 3/4"w x 5 3/4" x 1"

Design – Circular return valves - designed to be used in low and medium pressure ventilation air conditioning systems

6"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 11.75"h] 3-Way or 4-Way with actual outer dimensions of+ Product Details Size 6"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 7. 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 wear