G-9 is a woven glass fabric, melamine resin laminate. It is a very hard, flame resistant, machining grade phenolic with excellent electrical properties in high humidity conditions. It has high physical strength and excellent arc resistance. It is flame retardant, meeting UL94 flammability classification of V-0. It is designated by MIL-I-24768/1 Type GME and the NEMA grade is G-9.