... rust, without any galvanizing.black iron wire is a kind of hard drawn carbon steel wire, suitable for weaving, fencing, ... galvanizing or tying applications. For example, it's widely used in construction or daily use as binding material black annealed iron ... 100kg, 200kg , 500kg(0.5kg - 500kg) (or in according to your requirement)annealed iron wire compitive price of black annealed iron wire (factory)