12"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Brown [Outer Dimensions 13.75"w x 13.75"h] Color_Red Oak Wood actual front end outer dimensions

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 24" or 24" x 10" duct opening (measured at the opening)

+ Product Details Size - 12"w X 6"h is the size for the duct opening measurement only

so you are not left with much waste

+ Product Details Size – 24" x 24" with 10" collar T-Bar drop ceiling perforated return grill - metal back casing

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