8"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 27.75"h] steel + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 16"w X 34"h is the size for the duct opening measurement only

Check Out This Asin For Matching T-Bar Drop-Ceiling Grille: B007CNEJZK

Experience enhanced indoor comfort with our 8" Radial Damper

at predicted low air motion 35 fpm in the zone of occupancy

+ Product Details Size - 24"w X 4"h is the size for the duct opening measurement only

8"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 9.75"w x 27.75"h] steel + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 16"w X 34"h is the size for the duct opening measurement only Check Out This Asin For Matching T Bar Drop Ceiling Grille: B007CNEJZK