Dear Sir: Our company are professionally IMP.& EXP company in China,We export many good quality products to world market. We can export Pre-Stressing Strand products,The standard are ASTM-A416,grade have 250 grade and 270 grade.the type have 1x3,1x7. the Dia have 9.53mm,11.11mm,12.70mm,15.24mm. If you are interested in abovt products,Please contact with me,I will give you more datum and price for you referrence. Best regards, Gensheng Wang