20"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 27.75"h] Black High Standard Quality - Every 4 X 12 Is CRFG2028 Width_14in

High Standard Quality - Every part is hand inspected for quality before it is packaged

+ Product Details Size – 12" x 26" or 26" x 12" is the size for the duct opening measurement only

Filter Size - 23

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 24" OR 24" x 26" duct opening (measured at the opening)

High Standard

20"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"w x 27.75"h] Black High Standard Quality Every 4 X 12 Is CRFG2028 Width_14in High Standard Quality Every part is hand inspected for quality before it is packaged + Product Details Size – 12" x 26" or 26" x 12" is the size for the duct opening measurement only