Ultra fine quartz cotton, clean cotton, free of dust and impurities. Lightweight and snow-white. Commonly used for filling materials inside small columns. Widely used for filling the interlayer of ovens, furnace walls, furnace doors, high-temperature equipment, and facilities, playing a role in insulation, thermal insulation, sound insulation, thermal insulation, and so on. High temperature resistance of 1000 degrees. Directly using an open flame will not burn.