... Density:16kg/m3-20kg/m3 Insulated Al Flexible Duct Insulated Flexible Duct (al-foil duct,air duct) Model No:ZXLRG02Feature:Specifications:1. Full flexible ... , high quality factory thermally insulated duct, for all pressure air conditioning and ventilation system2. Diameter: 82mm ... /m38. Standard Length: 10m9. We accept small order Insulated Flexible Duct