30"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 35.75"h] Round Damper Ring + Product Details Size -

+ Product Details Size - 10"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 30 5/8" height

2" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

actual front end outer dimensions are approximately 32 5/8" width X 30 5/8" height

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

30"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 35.75"h] Round Damper Ring + Product Details Size -+ Product Details Size 30"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 75" Width X 35. 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