Ukrainian FP-1 drones recently hit three Russian rubber factories: Voronezhsyntezkauchuk, Omsk Kauchuk and Tolyattikauchuk. The segment produces polymers used in solid rocket fuel, including polybutadiene-acrylonitrile, a binder and a fuel component used in Iskander-M missile engines. Of about 10 large rubber factories in Russia, six have suffered 11 successful attacks as of October 25.