14"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 11.75"h] Copper Coil-Insulated Line Set + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 12" OR 12" x 22" duct opening (measured at the opening)

+ Product Details Size - 16"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 18" x 36" or 36" x 18" is the size for the duct opening measurement only

Universal Fit – Measures 6" wide x 3-1-13/16" high x 3-1/8" deep

14"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 15.75"w x 11.75"h] Copper Coil Insulated Line Set + Product Details Perfect Fit Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Perfect Fit & Easy Sizing Designed for a 22" x 12" OR 12" x 22" duct opening (measured at the opening) + Product Details Size 16"w X 18"h is the size for the duct opening measurement only