- Brand: FantechInclusions/Features: 3/32 Inch Diameter Brass Central Rod, EPBM Synthetic Rubber GasketMaterial Thickness: 24 GaugeType: Round, Spring LoadedDuct Size: 4 Inch DiameterBlade Material: H14 Aluminum
- Backdraft Damper for Circular Ducts, Manufactured from Galvanized Sheet Metal
- The 2-Blades are Spring-Loaded
- Every Damper is Built with Performance in Mind
- The Damper Can be Mounted Vertically
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