It is formed by molding flexible graphite tape or flexible graphite braided packing, metal materails can also be put in, they are often used together. It is mainly used for sealing of valves, pumps and expansion joints, which are used in oil industry, chemical industry, thermoelectric station, nuclear power station and other general industries. The property is stable and reliable. The new corrosion inhibitor sealing packing solve the problem of corrosion to the valve stem completely.