We professional produce black iron wire, it is made of iron wire, mostly used as tie wire in construction.
Wire diametre: 0.15mm--4.5mm
Packing: In coils, they wrapped inside with pvc strips and outside with hessian cloth or inside with pvc strips and outside with weaving bags. And each coil from 0.7kgs to 800kgs/coil
Besides, other requirements according to customer.