8"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 31.75"h] fixed bar + Product Details Size - Product Description Enhance your CRFG68 Victorian Floor Registers

+ Product Details Size - 24"w X 20"h X 2"d (for duct opening measurement only)

[Outer Dimensions: 26

Actual Filter Size – 24 3/4"w x 27 3/4" x 1"

+ Product Details Size – 18"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 8 5/8" height

8"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 9.75"w x 31.75"h] fixed bar + Product Details Size Product Description Enhance your CRFG68 Victorian Floor Registers + Product Details Size 24"w X 20"h X 2"d (for duct opening measurement only) [Outer Dimensions: 26