Packing and insulating materials made of rubber, gutta-percha, gum, asbestos, and mica, namely, rubber bags for merchandise packaging, cotton wool for packing and sealing purposes, laminated plastic film for use in packaging, fiberglass for insulation, adhesive packing tape for industrial and commercial use, sealant tape, protective films made of plastic used to protect surfaces, plastic in the form of sheets for use in manufacturing, insulators for electrical cables; plastics in extruded for...