Diameter Tension Item # Note Inches mm lbs kg Material 501CR e 0.029 0.73 15.89 7.20 New Cristal 502CR b 0.033 0.83 12.14 5.50 New Cristal 543R g 0.033 0.84 12.80 5.80 Alliance 514R D 0.030 0.74 15.89 7.20 Cantiga 515R A 0.034 0.86 14.35 6.50 Cantiga 516R E 0.043 1.09 14.57 6.60 Cantiga