The description of the item 3920510020 of Germany HScode: "Plates, sheets, film, foil and strip, of non-cellular poly""methyl methacrylate"", not reinforced, laminated, supported or similarly combined with other materials, without backing, unworked or merely surface-worked or merely cut into squares or rectangles (excl. self-adhesive products, and floor, wall and ceiling coverings of heading 3918) : Plate of poly(methyl methacrylate) containing aluminium trihydroxide, of a thickness of 3,5|mm or more but not more than 19|mm"