The description of the item 3921190070 of France HScode: Plates, sheets, film, foil and strip, of cellular plastic, unworked or merely surface-worked or merely cut into squares or rectangles (excl.those of polymers of styrene, vinyl chloride, polyurethanes and regenerated cellulose, self-adhesive products, floor, wall and ceiling coverings of heading 3918 and sterile surgical or dental adhesion barriers of subheading 3006.10.30) : Microporous membranes of expanded Polytetrafluoroethylene (ePTFE) in rolls, having: -|a width of 1|600|mm or more but not more than 1|730|mm, and -|a membrane thickness of|15|?m or more, but not more than 50|?mfor use in the manufacture of a bi-component ePTFE membrane