Rubber, gutta-percha, gum for use in the manufacture of packing and stopping material; asbestos in the form of felt and powder; mica and goods made from these materials and not included in other classes for use as a filler in the manufacture of plastics and electronic instruments; plastics in extruded form for use in industrial manufacture; packing, stopping and insulating materials, namely, rubber, gutta-percha, gum, asbestos, mica, flexible pipes, not of metal; acrylic rubber, air hoses, eb...