6” Insulated Flexible Duct 8 FT Long Noise Reducer Hose 6″ X 8 FT Gray
6″ Insulated Flexible Duct 8 FT Long, Gray Noise Reducer Hose Silencer for Inline Duct Fan of Air Conditioner HVAC Ventilation System. Reduce Noise： Noise Reducer Silencer is designed for reducing nosie from fans and carbon filter systems, can decrease the noise by up to 50%.