... 2.ozone and aging resistance 3.fiberglass line coated Silicone hot air duct Material: spring steel wire, silicone, glass fiber ... high temperature duct, as suction and blast hose, suitable for hot air , blower, exhausting gas, etc. 2.Heat resistant well ... Suction and blast hose, especially suitable: -For transmission hot and cold air. -For printing machines, blowers and compressors. -For exhausting ...