... security fence , security steel fence, ISO9001-2000COMPANY, Tel: +86 13757445098 Mr. David galvanized safety security fence, ISO9001-2000COMPANY,1) Material: Carbon steel ... A1011, A569, Q235, S275JR, SS304, SS400, Mild steel & Low carbon steel, etc 5Surface TreatmentBlack, self colour, hot dip galvanized ... serrated I bar (Mr. David Huang) 7StandardChina: YB/T 4001.1-2007, USA: ANSI/NAAMM(MBG531-88),UK: ...