Wire Materials: Iron wire or carbon steel wire. Soft Annealed Wire offers excellent flexibility and softness through the process of oxygen free annealing. Uses: Black Annealed Wire is mainly processed into coil wire, spool wire or big package wire. Or further straightened and cut into cut wire and U type wire. Annealed Wire is used as tie wire or baling wire in building, parks and daily binding.Packing: Spools, coils.Wire Diameters: Similar to galvanized iron wire, from 5mm to 0.15mm (wire gauge 6# to 38#).