... We are a leading professional supplier of high quality steel bar grating for construction project at competitive price, located ... in Ningbo \ near to Shanghai \ of China. Ningbo Lihong Steel Grating Co.,Ltd has approved ISO9001-2000 Quality Management ... A1011, A569, Q235, S275JR, SS304, SS400, Mild steel & Low carbon steel, etc 5Surface TreatmentBlack, self colour, hot dip galvanized, painted ...