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ITEM #: 5372278 Expandable/Flexible Aluminum Ductwork • Internal/external temp. range up to 500°F Made of strong, lightweight 0.005" aluminum alloy. Can be installed within walls, wall chases, or ceilings where inaccessibility requires a durable duct. Use in ventilation equipment for air and gas that is free of corrosive fumes or particles. All comply with NFPA standards 90A and 90B for Class O fire hazard classifications. UL Listed. This listing is for each.
Westaflex - W5049 - Noninsulated Flexible Duct, 10 in Flexible Duct Inside Dia., 1/8 in Flexible Duct Wall Thickness