18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Brown [Outer Dimensions 19.75"w x 25.75"h] Color_Red Oak Wood + Product Details Perfect Fit Height_16in RG1612AL Product Details Size 14

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 20" OR 20" x 32" duct opening (measured at the opening)

Actual Filter Size – 35 3/4"w x 5 3/4" x 1"

12" x 3" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

+ Product Details Outer dimensions: 17

actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height -

18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh Brown [Outer Dimensions 19.75"w x 25.75"h] Color_Red Oak Wood + Product Details Perfect Fit Height_16in RG1612AL Product Details Size 14 + Product Details Perfect Fit & Easy Sizing Designed for a 32" x 20" OR 20" x 32" duct opening (measured at the opening) Actual Filter Size – 35 3 4"w x 5 3 4" x 1"