- 4" x 25' Length
- R6 Insulation value. Required minimum in many building codes across the country
- Polyethylene jackets provide a durable, scuff-resistant vapor barrier that provides improved protection against damaging ultra-violet light.
- Installation is made easy with the reinforcing fiberglass yarn scrim, which acts as a rip-stop and prevents tearing
- Rigorously tested by Underwriters Laboratories, Inc. in accordance with UL 181, The Standard for safety in Factory-Made Air Ducts and Air Connectors.
Flex Duct - R-4.2 Insulated Flexible Air Duct - 18" In. X 25' Feet ... Description ATCO's 030 is a UL 181 Class 1 Air Duct and is manufactured with a reinforced metallized polyester jacket. The UPC 030 inner core is air-tight and is ... Amazon.com: flexible duct Dundas Jafine BTD48TC ProFlex Clothes Dryer Transition Duct UL 2158A Listed & Marked With 2 Tension Clamps, 4-Inch by 8-Foot by Dundas Jafine
