12"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 29.75"h] d Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 7 3/4" x 1"

Actual Filter Size – 15 3/4"w x 33 3/4" x 1"

+ Product Details Size – 18" x 26" or 26" x 18" is the size for the duct opening measurement only

complete with a supplied key

Looks Like It Was Just Waxed

12"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 29.75"h] d Actual Filter Size – 13+ Product Details Size 12"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 29. 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