The description of the item 3920621960 of Germany HScode: "Plates, sheets, film, foil and strip, of non-cellular poly""ethylene terephthalate"", not reinforced, laminated, supported or similarly combined with other materials, without support, unworked or not further worked than surface-worked or merely cut into squares or rectangles, of a thickness of <= 0,35 mm (excl. such self-adhesive products, floor, wall and ceiling coverings of heading 3918, poly""ethylene terephthalate"" film of a thickness of >= 100 but <= 150 micrometres for the manufacture of photopolymer printing plates and poly""ethylene terephthalate"" film of a thickness of >= 72 but <= 79 micrometres for the manufacture of flexible magnetic disks) : Poly (ethylene terephtalate) film: -|of a thickness of not more than 20|µm, -|coated on at least one side with a gas barrier layer consisting of a polymeric matrix in which silica or aluminium oxide has been dispersed and of a thickness of not more than 2µm"