16"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 31.75"h] Compatible with Duct 8" this piece is a perfect Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

this piece is a perfect touch of class you need to add to your decor

+ Product Details Size - 36"w X 18"h is the size for the duct opening measurement only

Design – Designed to withstand bends and sharp turns without kinking

+ Product Details Size - 25"w X 32"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 22" or 22" x 8" duct opening (measured at the opening)

16"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 17.75"w x 31.75"h] Compatible with Duct 8" this piece is a perfect Compatible With Duct 7in Applications This sheet metal DDAG A 1212 this piece is a perfect touch of class you need to add to your decor + Product Details Size 36"w X 18"h is the size for the duct opening measurement only