12"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 19.75"h] Grille + Product Details Size – Product Description Enhance your CRFG68 Victorian Floor Registers

+ Product Details Size – 36"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 36 5/8" width X 38 5/8" height

while the ingenious dial-controlled damper empowers you to effortlessly regulate airflow using your foot

making it a versatile choice for both residential and commercial settings

+ Product Details Size – 12" x 24" or 24" x 12" is the size for the duct opening measurement only

12"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 13.75"w x 19.75"h] Grille + Product Details Size – Product Description Enhance your CRFG68 Victorian Floor Registers + Product Details Size – 36"w X 12"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 36 5 8" width X 38 5 8" height