... -80micron 3) For flexible duct 4) Environmental 5) heat shrink insulation tube Brand name: dinghePlace of origin: zhejiang, China (mainland, Southeast coastal ... , double-sided aluminum foil, colored foil, aluminum composite belt, PET polyester tapeThickness: 20um or as per the customer’s requestsWidth: 12mm ... /L,Hcl,480hclassgrade 7 Zhejiang Ventilation Hoses Film Heat Shrink Insulation Tube