... boron Diameter:5.5-14mm Type: in coil ,in bundle Surface: Round, no twisted,light and smooth High Carbon/Low ... smoothDia torlerence:+/-0.3mmSpecifications High carbon/Low carbon/common carbon Steel wire rodWith boron for rebate taxGradeSAE1006B SAE1008B SAE1018BPackageIn coil ... 6.5mm 8mm 10mm 12mm 14mm 16mmTypesHigh Carbon ,Low carbon ,Common carbonExported CountrySouth Korea,Vietnam,Indonesia,Myanmar, ...