... ), RTJ( ring type joint)Coating: anti-rust oil, black paint, transparent yellow paint, hot dip galvanized, electric galvanizedPackage: seaworthy plywood case ... : welded, seemlessMaterial: carbon steelCoating: anti-rust oil, black paint, transparent varnish,Package: seaworthy plywood case, fumigation-free pallet About the companyHebei Xinfeng ...