We are expert in producing low relaxation prestressed concrete steel Strand, including 9.53mm,11.11mm, 12.7mm, 15.2mm, 15.24mm, 17.8mm, 21.6mm, according to GB/T5224-2003, ASTM A416, BS5896, ISO6934, EN10138 or the agreement. Welcome to our factory to talk about the business or by email, fax and telephone