Material: electric galvanized iron wire, hot-dip zinc-plating iron wire and black iron wire Specifications of u type wire: U type iron wire sizes: wire gauge 18#-22# (wire diameter from 0.7mm to 1.2mm). Meantime we can produce specific product according to customerí»s requirements. U type wire length: according to our customers' needs. U type iron wire materials: black annealed wire, electro galvanized wire, hot-dip galvanized wire and so on. Packing: Usually the packing of u type wire is pvc/wooden cage/pallet or according to the customer packing explanation