This would fit a recurve bow needing the AMO 72 standard. You can choose from 12, 14 or 16 strands. 12 strands is good up to 45lbs, 14 strands is 45-55lb and 16 strands is 55-70lb. The string is built out of B50 material and the ends are served with #4 nylon and polygrip center.
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