... -80micron 2) SGS Approved 3) For flexible duct 4) Environmental 5) 50 micron polyester film Brand name: dinghePlace of origin: zhejiang, China ... , double-sided aluminum foil, colored foil, aluminum composite belt, PET polyester tapeThickness: 20um (Accordance with your requirements )Width: 6mm~1100mm (Accordance ... 0.1mol/L,Hcl,480hclassgrade 7 Composited Film For Flexible Duct 50 Micron Polyester Film