32"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 17.75"h] Adjustable Return Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

+ Product Details Size - 10"w X 12"h X 2"d (for duct opening measurement only)

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

actual front end outer dimensions are approximately 16 5/8" width X 12 5/8" height

+ Product Details Size – 8"w X 8"h is the size for the duct opening measurement only

32"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 17.75"h] Adjustable Return Actual Filter Size – 23+ Product Details Size 32"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 75" Width X 17. 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