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- Brand: Metal-FabAngle: 45 DegreeApplicable Standard: UL 441, NFPA 54/211Item: AngleMaterial: Aluminum Alloy (Flue), G-90 Galvanized Steel (Casing)Material Thickness: 0.018 Inch (Outer Wall), 0.012 Inch (Inner Wall)Size A: 4 InchSize B: 4 InchType: Type B, Flat Fixed
- Vent Combines Hemmed Flues and Casings that Maximize Product Durability, Reliability and Minimize Installation Time

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