26"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 29.75"h] 10in diameter + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 10" OR 10" x 20" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 32" Or 32" x 34" duct opening (measured at the opening)

then you'll need a 14-inch round vent

+ Product Details Size - 6"w X 6"h X 2"d (for duct opening measurement only)

Click Add to Cart now & enjoy a new updated refreshing look of your room

26"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 27.75"w x 29.75"h] 10in diameter + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in + Product Details Perfect Fit & Easy Sizing Designed for a 20" x 10" OR 10" x 20" duct opening (measured at the opening) + Product Details Perfect Fit & Easy Sizing Designed for a 34" x 32" Or 32" x 34" duct opening (measured at the opening)