Spruce Pine Mica Co., Established in 1924, is the leading producer of precision Mica parts for optical, electronic, medical, aerospace and defense applications. We developed the Techniques and equipment for the production of precision blemish-free mica parts. Mica is nature's most perfect insulation. It provides outstanding insulation and withstands extremely hostile environments. Arcing will not cause carbon tracking, it withstands temperatures to 1200 Deg. farenheit for muscovite and 1800 Deg...