Name: black iron wire, also named black wire, black annealed iron wire, softanneal iron wire, black oil iron wire or carbon steel iron wire. Material: Q195 Wire Diameter: 0.7mm-5mm Tensile Strength: 350kg-550N/mm2 Weight/Coil: 0.1kg-800kg/coil Size: BWG6# to BWG34# Color : Black Type of supply: Coil wire;Spool wire;Straighten cut wire;U type wire Applications: It is mostly used in construction or as binding materials. Specifications: Black Iron Wire(Soft Annealed Iron Wire) Diameter: 0.5mm-6.0mm Tensile strength: 30kg-70kg/mm2 Elongation Rate: 10%-25% Weight/Coil: 0.1kg-800kg/coil. Packing: plastic inside and hessian woven outside,and nylon woven outside.