18"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 23.75"h] Return Grille + Product Details Size – 190RF 10X20 FBA crafted from heavy gauge Compatible With Duct 7in

+ Product Details Size – 16" x 22" or 22" x 16" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 32" OR 32" X 14" duct opening (measured at the opening)

actual front end outer dimensions are approximately 24 5/8" width X 22 5/8" height

+ Product Details Size – 24"w X 18"h is the size for the duct opening measurement only

+ Product Details Size - 14"w X 20"h is the size for the duct opening measurement only

18"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 19.75"w x 23.75"h] Return Grille + Product Details Size – 190RF 10X20 FBA crafted from heavy gauge Compatible With Duct 7in + Product Details Size – 16" x 22" or 22" x 16" is the size for the duct opening measurement only + Product Details Perfect Fit & Easy Sizing Designed for a 14" x 32" OR 32" X 14" duct opening (measured at the opening)