36"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 35.75"h] Powder-Coat actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 26 5/8" height

Actual Filter Size – 33 3/4"w x 23 3/4" x 1"

With these options

actual front end outer dimensions are approximately 42 5/8" width X 22 5/8" height -

This versatile diffuser is available in 1-way

36"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 35.75"h] Powder-Coat actual front end outer dimensions+ Product Details Size 36"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 35. 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