材質と仕上げ | SK4(硬度60~62HRC)、研磨 |
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型式 | A | L | L1 | B |
質量 (g) |
---|---|---|---|---|---|
BB-4 | 4 | 5 | 2 | 1.5 | 0.5 |
BB-5 | 5 | 6 | 2 | 2 | 1 |
BB-6 | 6 | 8 | 2 | 2 | 2 |
BB-8 | 8 | 10 | 2 | 3 | 4 |
BB-10 | 10 | 12 | 3 | 4 | 6.5 |
BB-12 | 12 | 14 | 3 | 6 | 12 |
BB-16 | 16 | 18 | 3 | 8 | 26 |
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