8"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 33.75"h] w18h18 Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 21 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 32" Or 32" x 34" duct opening (measured at the opening)

+ Product Details Size – 16" x 24" or 24" x 16" is the size for the duct opening measurement only

including the ability to mount without removing the thermostat when using the ring base

Can be hooked up with our Butterfly Dampersfor precise airflow control

8"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 33.75"h] w18h18 Actual Filter Size – 11+ Product Details Size 8"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 33. 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 wear