10" Duct Board Start Collar With Damper - For R4-R6 (1"-1.5") Duct Board

70165 MFG #: 559
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Knock-Out Holes for Damper Installation; Factory Assembled
Duct Collar; Type Start, Assembled; Size 10"; Material Thickness 28 Gauge; Material ASTM A653 B Galvanized Steel; Inclusions/Features 1" Outside Ring, Knockout Hole, Damper; Used On R4.2 and R6 Ductboard; Packaging Quantity 20 per Box