... , electro galvanized or hot-dip galvanized or black iron wire.U type iron wire sizes: Wire gauge 18#-22# (wire ... wire length: According to our customers' needs. U type iron wire materials: Black annealed wire, electro galvanized wire, hot- ... According to our customers' requirements. Material: Electric Galvanized Iron Wire, Hot-Dip Zinc-Plating Iron Wire, Black Iron Wire. Application: U type wire of ...