semi rigid flexible duct 1.Thickness : 0.1mm;0.08mm ; 2.Temperature ... Detail:20-30days after receiving the depositSpecification:semi rigid flexible duct1,Struction -soft aluminum foil2,Normal thickness -0. ... max is 4m8,Compression ratio- 1: 39,Fire resistance -non flammable.10,Packing in carton , special packing can be ... and air conditioning heating system. Semi-Rigid aluminum Flexible Air Ducting