low relaxation 1*7 pc strand 1. Diameter:9.35mm-15.24 mm. 2. Structure: 1x7. 3. Strength Grade: Grade 250 and Grade 270. low relaxation 1*7 pc strand1, standard: ASTM A, BS, AS, GB, EN 101382, size: 1*7 9.5MM -15.7MM3, name: pc indented strand, unbounden pc strand, pc wire1,standard: ASTM A416, BS5896,EN 10138, GB/T 5224, JISG , KS , AS, and so on,.2,the size: 1*3: 6.5MM; 8.6MM; 10.8MM 1*7: 7.9MM ...