Insulated Flex Duct 8x25 ft
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- 8 in x 25 ft flexible insulated duct - black jacket
- R4.2 value. UL 181 class 1 air duct
- Ideal for use in general ventilation applications including heating, air conditioning, intake and exhaust
- Flexible helix core made of 2 ply polyester laminate and corrosion resistant zinc coated wire. Is surrounded by glass fibre insu