4 Inch Insulated Soundproof Flexible Duct 8 FT Long, Black Noise Reducer Hose Silencer for Inline Duct Fan of HVAC

Product Information   Color: Black Ducting Opening Size: 3 inch 4 inch, 5 inch Strectch Lengh: 4 FT / 8 FT Thick layer of PVC&2 layers of Aluminum on this ducting prevents gas leaks. Works with extractor and inline duct fans, carbon filters which are 3"/ 4"/ 5" in diameter. Application HONGUAN duct silencer is suitable for HVAC system. It will move and deliver air in kitchens (cooking exhaust), green houses and grow rooms (air Circulation, intake, exhaust and light fixture cooling), bathrooms (smell and moisture exhaust), dryer rooms, grow tents and other applications etc.