It (NEMA L) is a thermoset rolled and molded composite consisting of a fine-weave cotton reinforcement combined with a phenolic resin system. RM320 complies with the requirements of MIL-I-24768/15, Type FBI. RM320 is designed for electrical and mechanical applications, including inserts, bushings, cams, gaskets, collars, bearings, spacers, and light-duty gears.