14" X 4" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 5.75"H] Aluminum Bar + Product Details Size –

+ Product Details Size – 10"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 36"h is the size for the duct opening measurement only

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+ Product Details Size – 12" X 4" is the size for the duct opening (floor/vent hole) measurement only

14" X 4" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 5.75"H] Aluminum Bar + Product Details Size –+ Product Details Size 14"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are 15. 75" width X 5. 75" height. Design Individually adjusting curved blades. Multi shutter damper with handle operator to adjust air flow. Screws Included High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds a