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] Powder-Coated actual front end outer dimensions accordion content RFG2525 Black-HP 18" Round Duct Pipe

actual front end outer dimensions are approximately 21 5/8" width X 31 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 30" or 30" x 10" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 12" OR 12" x 24" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 10" OR 10" x 22" duct opening (measured at the opening)

+ Product Details Size - 34"w X 32"h is the size for the duct opening measurement only

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] Powder Coated actual front end outer dimensions accordion content RFG2525 Black HP 18" Round Duct Pipe actual front end outer dimensions are approximately 21 5 8" width X 31 5 8" height + Product Details Perfect Fit & Easy Sizing Designed for a 10" x 30" or 30" x 10" duct opening (measured at the opening)