10"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 17.75"h] w6h6 16" Diameter Is The Size Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

16" Diameter Is The Size For The Duct Opening Measurement Only

actual front end outer dimensions are approximately 27 5/8" width X 14 5/8" height

actual front end outer dimensions are 22" width X 6" height

Installation – Installs directly on round & oval spiral duct - no frames

warehouses

10"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 11.75"w x 17.75"h] w6h6 16" Diameter Is The Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 16" Diameter Is The Size For The Duct Opening Measurement Only actual front end outer dimensions are approximately 27 5 8" width X 14 5 8" height