17 gutta-percha; gum, namely, raw gum, partly processed gum, and semi-worked gum; asbestos, mica; plastics in extruded form for use in manufacturing; packing, stopping and insulating materials, namely, plastic packing for shipping containers and for thermal insulation; flexible pipes of plastic; insulating materials; threads of plastic for soldering; pipe muffs of plastic; junctions of plastic for pipes; plastics in extruded form for use in further manufacturing, in the form of blocks, sheets, webs, films, rods, profiles, pipes and pipe mouldings; sheets and rods of plastics for use in further manufacturing; plastic fibres, not for textile use and for use in manufacture of chemical tanks; semi-processed plastics in the nature of filtering materials for use in industry; semi-processed foams or films of plastic; plastic in extruded form for general industrial use; pressed and mechanically processed panels of plastic for bullet-arrester devices for shooting ranges