high strength Low relaxation PC Strand with size 12.7mm,15.24mm and 17.8mm as per ASTM A 416,BS5896etc. High Strength Low Relaxation PC StrandSize:12.7mm,15.24mm,17.8mmStandard:ASTM A 416,BS5896 YB/T5224 etc.Application:Railways,high-speed ways,bridges,and other related big constructions High Strength Low Relaxation PC Strand