black iron wire material:low carbon steel Technique: Annealed Wire Wire Gauge: 0.2mm - 5.5mm Surface Treatment: Galvanized black iron wireWire diameter:BWG26-BWG8Roll weight :1kg,3kg,8kg,25kg,...Packing :plastic cloth inner,hessian cloth outerAttention :generally,before loading and packing,we will paint oil to the surface of the wire to prevent getting rust black iron wire