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Product HighlightsA trunk duct spin-in collar installs quickly and easily with minimal tools and provides a secure attachment when joining Duct Board to pipe or flexible duct. The built in damper helps to regulate air flow through the trunk duct run.
- Hot Dipped Galvanized Steel per ASTM A653 CS Type B
- 28 Gauge
- Approximately 1-1/2" crimp
California residents: see Proposition 65 Warning
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