Black iron wire, also called black wire, comes in the form of coil wire or cut wire.

Mostly used in construction or daily use as binding material.

Black annealed wire, Soft annealed wire
BWG11-19  4.0MM-0.8MM
Tensile strength: 30-50kg/mm2
Packing :10-200kg/coil plastic inside and hassian outside/ weave outside.