尺寸 | 测量 | 头部尺寸 | 每磅约数 | |
1-1/4" | 3D | 14 | 13/64" | 543 |
1-1/2" | 4D | 12-1/2 | 1/4" | 294 |
1-3/4" | 5D | 12-1/2 | 1/4" | 254 |
2" | 6D | 11-1/2 | 17/64" | 167 |
2-1/4" | 7D | 11-1/2 | 17/64" | 150 |
2-1/2" | 8D | 10-1/4 | 9/32" | 101 |
3" | 10D | 9 | 5/16" | 66 |
3-1/4" | 12D | 9 | 5/16" | 61 |
3-1/2" | 16D | 8 | 11/32" | 47 |
4" | 20D | 6 | 13/32" | 29 |
4-1/2" | 30D | 5 | 7/16" | 22 |
5" | 40D | 4 | 15/32" | 17 |
5-1/2" | 50D | 3 | 1/2" | 13 |
6" | 60D | 2 | 17/32" | 10 |




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