10"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 15.75"h] w10h10 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 28" OR 28" X 16" duct opening (measured at the opening)

+ Product Details Size - 8"w X 4"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height -

Installs Directly On Round & Oval Spiral Duct - No Frames

Design – Rigid gauge ABS plastic

10"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 15.75"h] w10h10 + Product Details Perfect Fit+ Product Details Size 10"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 15. 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