Specification as follow:
| wire guage | SWG(mm) | BWG( mm) | in Metic system mm |
| 8# | 4.06 | 4.19 | 4 |
| 9# | 3.66 | 3.76 | - |
| 10# | 3.25 | 3.4 | 3.5 |
| 11# | 2.95 | 3.05 | 3 |
| 12# | 2.64 | 2.77 | 2.8 |
| 13# | 2.34 | 2.41 | 2.5 |
| 14# | 2.03 | 2.11 | - |
| 15# | 1.83 | 1.83 | 1.8 |
| 16# | 1.63 | 1.65 | 1.65 |
| 17# | 1.42 | 1.47 | 1.4 |
| 18# | 1.22 | 1.25 | 1.2 |
| 19# | 1.02 | 1.07 | 1 |
| 20# | 0.91 | 0.89 | 0.9 |
| 21# | 0.81 | 0.813 | 0.8 |
| 22# | 0.71 | 0.711 | 0.7 |
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