Rubber, raw or semi-worked; synthetic rubber; acrylic rubber; plastic substances, semi-processed; sound dampening blankets; plastic semi-worked products for dampening, namely, semi-worked synthetic plastic as semi-finished products in the form of foams, films, and sheets; self-adhesive plastic sheets for use in manufacturing; latex rubber for industrial use, namely, manufacture of cushioning for packing purposes; latex rubber for use for, namely, manufacture of packing cushioning; synthetic r...