... ozone resistance and aging resistance 3.well bending 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 ... blast hose, especially suitable:-For transmission hot and cold air.-For printing machines, blowers and compressors.-For exhausting gas, engine construction, ...