10"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 15.75"h] 14" Diameter The first number in a

The first number in a grille size represents the width

please note that the total outer dimensions of the grille measure 7" in diameter

+ Product Details Size – 20" x 24" or 24" x 20" is the size for the duct opening measurement only

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 30" OR 30" x 24" duct opening (measured at the opening)

10"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 15.75"h] 14" Diameter The first number in a+ Product Details Size 10"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 15. 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