... 42mm, 48.3mm-48.6mm Type:Black,galvanized or pre-galvanized Frame scaffolding Brief IntroductionTianjin Xinyue ... Columns, Purlins, Greenhouse, Stands Towers, Agricultural EquipmentProcessERWTypeBlack,galvanized or pre-galvanizedStandardBS 1139, BS1387-1985, EN 39 ... L360- L555STK400, STK500SurfaceLightly oiled, Hot dip galvanized, Electro galvanized, Black PackingPlastic plugs in both ends, Wrapped ...