1.Diameter:4.0mm~7.0mm 2.Strength:1570mpa 3.Standard:GB,ASTM 4.Used for: railway and highway bridge, roof truss Prestressed Concrete Steel Wire 1.Diameter:4.0mm~7.0mm2.Strength:1570mpa3.Standard:GB,ASTM4.Used for: railway and highway bridge, roof truss High strength, low slack, delivered in coils, proper length, low waste and strongly bonded with spiral ribbed wire and concrete. used for ...