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 Filter Size – 15

Actual Filter Size – 15 3/4"w x 27 3/4" x 1"

This versatile diffuser is available in 1-way

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height

Actual Filter Size – 27 3/4"w x 29 3/4" x 1"

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

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 Filter Size – 15+ 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