With damper
MaterialASTM-A653 CS Type B Galvanized Steel, G-30 Coating LFQ Chemical Treatment
AssemblyStarting Collars are assembled with 1/8″ x 1/8″ Zinc Coated Steel Rivets
CollarRolled formed and features 1 1/2 crimp and 3/8″ Convex Bead(s) for Branch Duct Connection
DamperDuro Dyne Rapit Regulator 5 piece w/ handle
Options310L – 1 1/8″ Tabs available 4″ through 20″
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