28"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 9.75"h] 6" Diameter + Product Details Size - CRFG2028 Width_14in 4 X 12 Is

+ Product Details Size - 22"w X 8"h is the size for the duct opening measurement only

High quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size - 28"w X 20"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 38 5/8" width X 34 5/8" height

Actual Filter Size – 29 3/4"w x 31 3/4" x 1"

28"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 29.75"w x 9.75"h] 6" Diameter + Product Details Size CRFG2028 Width_14in 4 X 12 Is + Product Details Size 22"w X 8"h is the size for the duct opening measurement only High quality – High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges