latex rubber for use in the manufacture of tires, cable, paper, gutta-percha, mica; semi-finished products, namely, extruded plastics in the form of bars, blocks, pellets, rods, sheets and tubes for use in manufacturing; sealing material; packing materials; insulating materials; semi-finished polycarbonate-plastic-products in the form of films, sheets, tubes, bars, or rods for use in a variety of industries; flexible tubes of plastic, not of metal; plastic sheets for use in the manufacture of...