Harog Technology independently researches and develops impregnants, with superior formula and material composition, and has a whole graphite anti-oxidation modification production line, advanced anti-oxidation technology, and the graphite density has been increased from 1.8g/cm3 to 2.0g/cm3. When the conventional anti-oxidation temperature is increased from about 600 ℃ to 1200 ℃, the mass loss ratio is reduced by 98%.