... fireproof and airtight 3.compressible durable and lightweigh electrical clothes dryer duct hose 1.Aluminum fexible duct2.fireproof and airtight3. ... kitchen venting system, hydroponics exhaust system,HVAC , rang hood ,clothes dryer vent ,inline fan air vent ,roof ventilation , ventilator use , ... (75-736mm)Bend Radius 1.5” x 1.D.Lengths 10 M or as to requestCompression ratio 1: 16Maximum Velocity: 5500 ...