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Basic sizes | IT12(mm) | IT13(mm) | IT14(mm) | ||||
<3mm | 0.1 | 0.14 | 0.25 | ||||
3-6mm | 0.12 | 0.18 | 0.3 | ||||
6-10mm | 0.15 | 0.22 | 0.36 | ||||
10-18mm | 0.18 | 0.27 | 0.43 | ||||
18-30mm | 0.21 | 0.33 | 0.52 | ||||
30-50mm | 0.25 | 0.39 | 0.62 | ||||
50-80mm | 0.3 | 0.46 | 0.74 | ||||
80-120mm | 0.35 | 0.54 | 0.87 | ||||
120-180mm | 0.4 | 0.63 | 1 | ||||
180-250mm | 0.46 | 0.72 | 1.15 | ||||
250-315mm | 0.52 | 0.81 | 1.3 | ||||
315-400mm | 0.57 | 0.89 | 1.4 | ||||
400-500mm | 0.63 | 0.97 | 1.55 |