Hon&Guan 4'' Insulated Flexible Duct - 8 FT Noise Reducer Hose, Insulated Duct f
Manufacturer Hon&Guan. Variety of Applications：Hon&Guan insulated flexible duct is suitable for HVAC system. Hon&Guan noise reducer ductings super flexible and easy to install, it will slide right on your duct fan, vent exhaust, carbon filter.