8"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Brown [Outer Dimensions 9.75"w x 9.75"h] 14in diameter + Product Details Size - CL 34 12B 35 Product Details Size 6 Extruded Aluminum Ceiling

+ Product Details Size - 10"w X 28"h X 2"d (for duct opening measurement only)

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

Actual Front End Outer Dimensions Are 16" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

5"w X 12"h]

actual front end outer dimensions are approximately 31

8"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh Brown [Outer Dimensions 9.75"w x 9.75"h] 14in diameter + Product Details Size CL 34 12B 35 Product Details Size 6 Extruded Aluminum Ceiling + Product Details Size 10"w X 28"h X 2"d (for duct opening measurement only) actual front end outer dimensions are approximately 16 5 8" width X 16 5 8" height