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C4MC 906 Capstan Back Plate
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| C4MC No | D | D1 | D2 | D3 | E | T | kg |
| 906-401 | 5 1/4 | 152 | 119 | 65 | 32 | 4.8 | 3.6 |
| 906-403 | 5 1/4 | 254 | 119 | 65 | 32 | 4.8 | 11 |
| 906-405 | 7 1/2 | 254 | 159 | 105 | 32 | 7.9 | 9.8 |
| 906-406 | 7 1/2 | 305 | 159 | 105 | 32 | 7.9 | 15 |
| 906-408 | 10 | 356 | 203 | 149 | 45 | 9.5 | 28 |
