32"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 15.75"h] Powder-Coat Solid Base for Stability –

Solid Base for Stability – Built with a solid base for reliable mounting and stability

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

and the second number represents the height

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

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

32"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 15.75"h] Powder-Coat Solid Base for Stability –+ Product Details Size 32"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 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