Construction: alufoil PET or alufoil PET alufoil,helix wire,glass wool,reinforced PET alufoil (jacket) Fire Resistance:Class B1(GB8624)Diameter: 4,5,6,8,10,12, 14,16"  and moreStandard Length: 10mPacking: Individual poly bag or Carton BoxWorking Pressure: 2500 Pa(max)Air Velocity: 30 m/s(max)Temperature Range: -30°C~+140Insulation: 25mm thickness fiberglass and 18kg/m3Inner Core: alufoil PET or alufoil PET alufoil laminateJacket(Outside): Reinforced PET aluminium

Pre-insulated flexible duct