18"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 15.75"h] Aluminum actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

actual front end outer dimensions are approximately 16 5/8" width X 27 5/8" height

+ Product Details Size – 10" x 26" or 26" x 10" is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 21 3/4" x 1"

[Outer Dimensions: 16

+ Product Details Size - 6"w X 18"h is the size for the duct opening measurement only

18"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 19.75"w x 15.75"h] Aluminum actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 actual front end outer dimensions are approximately 16 5 8" width X 27 5 8" height + Product Details Size – 10" x 26" or 26" x 10" is the size for the duct opening measurement only