Description Overview Spring steel wire Specifications 1.3 mm diameter, 80 to 100 kg per bobbin 2.0 mm diameter, 100 to 150 kg per bobbin 2.2 mm diameter, 100 to 150 kg per bobbin 5.0 mm diameter, 400 to 500 kg per bobbin Tensile strength: 1700 to 1850 N/mm2 Coil size: 500 to 600 kg