... . Standard: ASTM/BS/JIS/GB/AS 3. Model type for PC strand: 12.7mm,12.9mm,15.2mm,15.7mm 1 ... steel, casting iron, strip steel etc.4) Models suitable for: PC strands 1x7 - 9.3, 9.53, 12.5, 12.7 ... , 18.0, 21.6, 21.8mm; PC strands 1x3 - 6.5, 8.6, 10.8mm; PC Wire 4.0, 5.0, 6.0 ...