18"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 11.75"h] 1-Way Size - 10"w X 10"h Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Size - 10"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 6"w X 28"h X 2"d (for duct opening measurement only)

Actual Filter Size – 7 3/4"w x 13 3/4" x 1"

Actual Filter Size – 25 3/4"w x 9 3/4" x 1"

Carefully Shrink Wrapped – With cardboard backing to prevent damage in shipment

18"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 19.75"w x 11.75"h] 1 Way Size 10"w X 10"h Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Size 10"w X 10"h is the size for the duct opening measurement only + Product Details Size 6"w X 28"h X 2"d (for duct opening measurement only)