... 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 ... , KS , AS, and so on,.2,the size: 1*3: 6.5MM; 8.6MM; 10.8MM 1*7: 7.9MM; 9.3MM; 9.53MM ... , I am hold on on your email all the time. and it will be answered promptly. low relaxation 1*7 pc strand