... material. 4.Physical and chemical properties analysis: gravel stone filter media AnalysisMeasure DataAnalysis ProjectMeasure DataSilica (SiO2) 98% ... 1, High Level, Mingyang Garden, Gongyi , Gongyi Henan, China (Mainland)Number of Employees:101 - 200 People View management ... 1, High Level, Mingyang Garden, Gongyi, Hnan, China (Mainland)Legal Representative/CEO:Xiaobo WuLegal Form:Limited Lability ...