Film of dielectric material, which film contains gas bubbles preferably of a flat shape. The system assesses, controls and optimizes network performance, providing an efficient interface for installing, configuring and operating various features of the optimization system. The toneable conduit includes an elongate polymeric tube having a wall with an interior surface, an exterior surface, and a predetermined wall thickness. The invention also relates to soybean cultivars or breeding cultivars, and plant parts derived from soybean cultivar 18172925. The hollow shaft is coupled to the differential case for rotation therewith and is configured to transmit rotary power in a power path between the disconnect clutch and the differential assembly.