Graduated in .0.01mm increments with standard measurement sizes from 25mm to 500mm.
No.                       Range mm                      No.                 Range mm
1                               0-25                               11                      250-257
2                              25-50                             12                       275-300
3                              50-75                             13                       300-325
4                              75-100                           14                       325-350
5                              100-125                         15                       350-375
6                               125-150                        16                       375-400
7                              150-175                         17                       400-425
8                              175-200                         18                        425-450