Packing and insulating materials and stopping materials in the nature of door stops of rubber; flexible pipes, tubes and hoses, not of metal; fluorinated synthetic rubber; FKM, namely, fluororubber; FPM, namely, fluororubber; fluoroelastomer being synthetic rubber; fluoropolymer in the form of films, sheets, tubes, bars, rods, blocks, pellets and powders for industrial and commercial use; semi-processed plastic and plastic substances; vulcanized fiber and vulcanite; semi-processed plastics fo...