Plates, sheets, film, foil and strip, of noncellular poly"methyl methacrylate", not reinforced, laminated, supported or similarly combined with other materials, without backing, unworked or merely surfaceworked or merely cut into squares or rectangles (excl. selfadhesive products, and floor, wall and ceiling coverings of heading 3918)
Plates, sheets, film, foil and strip, of noncellular acrylic polymers, not reinforced, laminated, supported or similarly combined with other materials, without backing, unworked or merely surfaceworked or merely cut into squares or rectangles (excl. those of poly"methyl methacrylate", selfadhesive products, and floor, wall and ceiling coverings of heading 3918)