12"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 9.75"h] Aluminum Bar Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 19 3/4" x 1"

High Quality – Polished pre-finish gloss varnish ready to install - can also be sanded and re-finished according to application needs

+ Product Details Size – 6" x 32" or 32" x 6" is the size for the duct opening measurement only

+ Product Description This aluminum flex duct is intended to be used in heating

Location – Sidewall and ceiling

12"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 9.75"h] Aluminum Bar Actual Filter Size – 21+ Product Details Size 12"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 9. 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