Silicone Coated Fiberglass Fabric Duct Hose Silicone Coated Fiberglass Fabric Duct Hose is a high temp duct suited for a variety of applications such as hot air and fumes. This flex silicone air ducting hose consists of double layer silicone coated fiberglass reinforced with a spring steel wire helix & external filament fiberglass cord.…