Shanxi Dingtai Yinrui Filter Manufacturing Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sale of foundry filters. Founded in 1997, Linfen Huidong Filter Co., Ltd. was formally established in 2003. Due to business expansion, Shanxi Dingtai Yinrui Filter Manufacturing Co., Ltd. was independently established in 2016. The company covers nearly 12,000 square meters and employs over 100 people. It primarily produces silicon carbide, zirconium oxide, white zirconium, and alumina ceramic foam filters.