... and airtight 3.compressible durable and lightweigh electrical clothes dryer duct hose 1.Aluminum fexible duct2.fireproof and airtight3. ... venting system, hydroponics exhaust system,HVAC , rang hood ,clothes dryer vent ,inline fan air vent ,roof ventilation , ventilator use ... 'sa flexible ducting with a reinforced PVC polyester riber cloth with an encapsulated high tensile steel wire helix.-Acid ...