... resistant black protection filmAEROFLEX EPDM Insulation pipe1.Light, flexible, closed cell;2.Free of PVC, CFC.3 ... weathering resistance7.Wall thickness: 13mm/20mmPre-insulated Flexible Single Pipe Model NameAKSG01-12-13/20AKSG01-16-13/20AKSG01 ... Friendly CFC ,HCFC free UV, Weather ResistanceExcellent Flexible Stainless Steel Corrugated PipeMaterial SUS304/316LOuter Diameter(mm)DNThickness ...