18"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Brown [Outer Dimensions 19.75"w x 19.75"h] Compatible with Duct 10" Actual Filter Size – 29 4 X 12 Is CRFG2028 Width_14in

Actual Filter Size – 29 3/4"w x 9 3/4" x 1"

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height -

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 30" or 30" x 12" duct opening (measured at the opening)

Durable stamped steel construction ensures long-lasting performance

modern Victorian

18"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh Brown [Outer Dimensions 19.75"w x 19.75"h] Compatible with Duct 10" Actual Filter Size – 29 4 X 12 Is CRFG2028 Width_14in Actual Filter Size – 29 3 4"w x 9 3 4" x 1" actual front end outer dimensions are approximately 22 5 8" width X 12 5 8" height