Using strong micro nylon resin material, the vertical line of the body, were associated with high flexibility, good toughness, flexibility polar molecule with a new reinforced high density, high specific gravity, water cut fast surface LHM, special water treatment, water absorption low, good toughness, good performance, sensitivity, and feel neat, bend, not wrapped Note: 0.52-1.28mm diameter powerful error ± 7%, 1.38-5.0mm diameter error of ± 8% strength