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HoldRite HydroFlame 1.5-in to 12-in Dia Intumescent Pipe Collar in the Firestop Products & Systems department at Lowes.com
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Metacaulk 66350 Intumescent Pipe Collar, 3 inch | Buy Fire Protection Fittings & More at Southern Pipe & Supply
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UL 1479 Tested Intumescent Pipe Collar - China Intumescent Fire Collar, Pipe Collar | Made-in-China.com
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