16"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 11.75"h] Return Grille Seamless Installation: Designed to fit

Seamless Installation: Designed to fit seamlessly into a 24 by 24 inch opening

heat pump and centralized air ducted units

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 34" or 34" x 6" duct opening (measured at the opening)

Actual Filter Size – 19 3/4"w x 33 3/4" x 1"

16"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 11.75"h] Return Grille Seamless Installation: Designed to fit+ Product Details Size 16"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 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