0 0 0 0 0 0 0 0 0 3920.51 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 (xcl. self-adhesive products, and floor, wall and ceiling coverings of heading 3918)