It is a tube form composed of a medium weight glass reinforcement combined with a melamine resin system. It meets the requirements of MIL-I-24768/8, Type GMG. RT505 is designed for the presence of arc and flame in electrical applications. It is an environmentally sensitive product, and should not be used in areas of high humidity. It is suitable for rings, collars, inserts, spacers, bushings, insulators, and fuse casings.