34"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 7.75"h] w6h6 Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 35 3/4" x 1"

+ Product Description Our Clear Plastic Thermostat Guard is the ultimate solution for protecting your thermostat while ensuring universal compatibility

+ Product Details Size - 32"w X 16"h X 2"d (for duct opening measurement only)

+ Product Details Size - 18"w X 34"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 10" or 10" x 14" duct opening (measured at the opening)

34"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 7.75"h] w6h6 Actual Filter Size – 21+ Product Details Size 34"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 7. 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