4" X 12" Nickel Victorian Floor Register Grille - Modern Contemporary Decorative Grate - HVAC Vent Duct Cover - Brush Nickel Powder Coated + Product Details Size –

+ Product Details Size – 30"w X 8"h is the size for the duct opening measurement only

+ Product Details Size – 14"w X 6"h is the size for the duct opening measurement only

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

For example

4" X 12" Nickel Victorian Floor Register Grille - Modern Contemporary Decorative Grate - HVAC Vent Duct Cover - Brush Nickel Powder Coated + Product Details Size –+ Product Details Size 12" X 4" is the size for the duct opening (floor vent hole) measurement only, actual front end outer dimensions are 13. 5" X 5. 5" High Quality Solid rigid steel body for durability and reliability. Installation Location Floor. Design Premium plated finish and modern contemporary design forming a luxurious piece. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed. Quality Packaging