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- This wire helix duct made of steel wire and layers of aluminum and polyester is UL® 2158A listed.
- Steel wire support, multi-ply design of aluminum and polyester
- PRO performance level
- Lengths 8′ and under are UL® listed and labeled as foil dryer transition duct.
- Diameter4 inDomestic / ImportDomesticFlow Rate5000 fpmLength8 ftManufacturerBuilders Best IncManufacturer #10505ShapeRoundTemperature Rating-20 to 200 deg F