4" flexible duct, R4.2 Rating, 25ft
Item Number: 411061
FIDT are insulated flexible ducts for indoor use in residential and commercial HVAC systems with low-to-medium operating pressure. Ducts are manufactured with a tri-directional fiberglass scrim reinforced, metallized polyester outer jacket. R4.2 value. Available in 25 ft length. UL 181 certified.