... \ near to Shanghai \ of China. Ningbo Lihong Steel Grating Co.,Ltd has approved ISO9001-2000 Quality Management System in 2001. ... customized shapes per client's requirements. Ningbo Lihong Steel Grating Co., Ltd ISO9001-2008 & SGS CompanySTEEL GRATING SPECIALIST, YOUR ... A1011, A569, Q235, S275JR, SS304, SS400, Mild steel & Low carbon steel, etc 5Surface TreatmentBlack, self colour, hot dip galvanized, ...